Просмотр кода страницы Английская Википедия:Business routes of Interstate 75 in Michigan

{{Английская Википедия/Панель перехода}}
{{Short description|Highways in Michigan}}
{{infobox road
|state=MI
|type=BLBS
|route=75
|map={{maplink|frame=yes|plain=yes|frame-align=center|frame-width=290|frame-height=320|frame-lat=44.081|frame-long=-83.901|zoom=6|type=line|raw={{Wikipedia:Map data/Wikipedia KML/Business routes of Interstate 75 in Michigan}}}}
|map_custom=yes
|map_notes=Business routes of Interstate 75 highlighted
|maint=none
|previous_type=I
|previous_route=75
|next_type=M
|next_route=75
}}
There have been nine '''business routes for Interstate&nbsp;75''' in the US state of [[Michigan]]. Numbered either '''Business Loop Interstate&nbsp;75''' ('''BL I-75''') or '''Business Spur Interstate&nbsp;75''' ('''BS I-75''') depending if they are a full [[business loop]] or a [[business spur]], these highways are former routings of [[Interstate 75 in Michigan|I-75]]'s predecessor highways in the state. They were designated as I-75 was completed through the various areas of Michigan. The business loop in [[Pontiac, Michigan|Pontiac]] runs through that city's downtown along a section of [[Woodward Avenue]] and a segment of roadway formerly used by [[M-24 (Michigan highway)|M-24]]. The former [[Saginaw, Michigan|Saginaw]] business loop was once a part of [[U.S. Route 23 in Michigan|US Highway&nbsp;23]] (US&nbsp;23), as was most of the original [[Bay City, Michigan|Bay City]] business loop (that one has been converted into a business spur). The roadways that make up the business loops in [[West Branch, Michigan|West Branch]] and [[Roscommon, Michigan|Roscommon]] were previously part of [[M-76 (Michigan highway)|M-76]], I-75's predecessor through that part of the state. In [[Northern Michigan]], the [[Grayling, Michigan|Grayling]] and [[Gaylord, Michigan|Gaylord]] BL I-75s were part of [[U.S. Route 27 in Michigan|US&nbsp;27]], and the two business routes in [[St. Ignace, Michigan|St. Ignace]] and [[Sault Ste. Marie, Michigan|Sault Ste. Marie]] in the [[Upper Peninsula of Michigan]] were part of [[U.S. Route 2 in Michigan|US&nbsp;2]]. A tenth business route, a loop through [[Indian River, Michigan|Indian River]] has been proposed. Each of the business loops connects to I-75 on both ends and runs through their respective cities' downtown areas. The two business spurs only connect to I-75 on one end and run into the appropriate downtown.
__TOC__{{-}}

==Pontiac==
{{infobox road small
|state=MI
|type=BL
|route=75
|location=[[Pontiac, Michigan|Pontiac]]
|length_mi= 8.384
|length_ref=<ref name=PRFA>{{cite MDOT PRFA |link = yes |access-date = May 10, 2015 }}</ref>
|formed=1963<ref name=MSHD63>{{cite MDOT map |year = 1963 |sections = C10, L13 }}</ref><ref name=MSHD64P>{{cite MDOT map |year = 1964 |section = L13 }}</ref>
}}

'''Business Loop I-75''' ('''BL I-75''') is a [[business loop]] serving [[Pontiac, Michigan|Pontiac]] and [[Auburn Hills, Michigan|Auburn Hills]]. It uses portions of former '''Business M-24''' ('''Bus. M-24''') through town. The highway starts as an eight-lane [[freeway]] at an interchange on [[Interstate 75 in Michigan|I-75]] in [[Bloomfield Township, Oakland County, Michigan|Bloomfield Township]] running westerly. The freeway continues past an interchange with Opdyke Road to end at Square Lake Road, dropping to six lanes. BL I-75 continues to [[M-1 (Michigan highway)|M-1]] at Woodward Avenue. Square Lake Road continues to the west as [[U.S. Route 24 Business (Pontiac, Michigan)|Bus. US&nbsp;24]], and BL I-75 turns northwesterly along the eight-lane divided Woodward Avenue, [[concurrency (road)|running concurrently]] with Bus. US&nbsp;24 into downtown Pontiac. At the south side of downtown, Woodward drops to six lanes as the two directions of Woodward Avenue split and form a four-lane loop. The Woodward Avenue Loop encircles downtown Pontiac, and it is crossed by the eastbound direction of [[M-59 (Michigan highway)|M-59]] running on Huron Street. One block north, the westbound direction of M-59 runs along University Drive and turns to follow BL I-75/Bus. US&nbsp;24 (Woodward Avenue Loop). The loop intersects Perry Street another block further north, and BL I-75 turns northeasterly onto the two-way Perry Street. (The southbound direction from Perry Street continues around the Woodward Avenue Loop back to Woodward Avenue.) BL I-75 passes through residential areas and a minor business area along the four-lane Perry Street. Outside of the downtown area, Perry Street widens to include a center turn lane. North of Walton Boulevard in Auburn Hills, the street name changes to Lapeer Road. BL I-75 intersects Opdyke Road a couple hundred feet west of I-75 before crossing the freeway. Lapeer Road continues as a six-lane, divided roadway to the ramps of a double [[trumpet interchange]], where the BL I-75 designation ends. The roadway however, continues as [[M-24 (Michigan highway)|M-24]].<ref name=MDOT14P>{{cite MDOT map |year = 2014 |inset = Detroit |sections = A8–B9 }}</ref><ref name=googleP>{{google maps |url = https://www.google.com/maps/dir/42.6131757,-83.2296665/42.6927895,-83.2512976/@42.6486386,-83.2976612,15050m/data=!3m1!1e3!4m9!4m8!1m5!3m4!1m2!1d-83.2913585!2d42.6428299!3s0x8824bfb3656f2447:0xa3d6597cb79c99a3!1m0!3e0 |title = Overview Map of BL I-75 in Pontiac |access-date = May 10, 2015 }}</ref> [[Annual average daily traffic|On average each day]] in 2013, 9,829&nbsp;vehicles use the business loop between the two M-59 junctions, and 73,795&nbsp;vehicles do so on the freeway stub east of Opdyke Road, the lowest and highest traffic counts.<ref name=TMIS>{{cite web |author = Bureau of Transportation Planning |url = http://mdotnetpublic.state.mi.us/tmispublic/ |title = Traffic Monitoring Information System |publisher = Michigan Department of Transportation |year = 2008 |access-date = May 12, 2015 }}</ref>

In 1919 when the state highway system was first numbered,<ref name=press-1919-09-20>{{cite news |title = Michigan May Do Well Following Wisconsin's Road Marking System |work = [[The Grand Rapids Press]] |date = September 20, 1919 |page = 10 |oclc = 9975013 }}</ref> the main north–south highway through Pontiac was numbered [[M-10 (Michigan highway)|M-10]],<ref name=MSHD19LP>{{cite MDOT map |date = 1919-07-01L }}</ref> and it was renumbered to [[U.S. Route 10 in Michigan|US&nbsp;10]] seven years later when the [[United States Numbered Highway System]] was created.<ref name=USH>{{cite map |author1 = [[Bureau of Public Roads]] |author2 = [[American Association of State Highway Officials]] |date = November 11, 1926 |title = United States System of Highways Adopted for Uniform Marking by the American Association of State Highway Officials |url = https://commons.wikimedia.org/wiki/File:United_States_System_of_Highways_Adopted_for_Uniform_Marking_by_the_American_Association_of_State_Highway_Officials.jpg |scale = 1:7,000,000 |location = Washington, DC |publisher = [[United States Geological Survey]] |oclc = 32889555 |access-date = November 7, 2013 |via = [[Wikimedia Commons]] |name-list-style = amp }}</ref> By the next year, M-24 was designated from downtown Pontiac northward to [[Lapeer, Michigan|Lapeer]].<ref name=MSHD27-12>{{cite MDOT map |date = 1927-12-01 }}</ref> M-24 was moved to an eastern bypass of town in 1936, and the former routing in town became M-24A.<ref name=MSHD36-06>{{cite MDOT map |date =1936-06-01 |c-link = yes |sections = D12, L13 }}</ref><ref name=MSHD36-12>{{cite MDOT map |date = 1936-12-15 |sections = D12, L13 }}</ref> This was redesignated Bus M-24 in 1940.<ref name=MSHD40-07>{{cite MDOT map |date =1940-07-15 |sections = G10, L13 }}</ref><ref name=MSHD40-12>{{cite MDOT map |date =1940-12-01 |sections = G10, L13 }}</ref>

A number of highway designation and routing changes in the Pontiac were made when US&nbsp;10 was shifted out of downtown to replace [[M-58 (Michigan highway)|M-58]] along Telegraph Road west of downtown by the middle of 1961. Before the change, US&nbsp;10 followed Dixie Highway and Oakland Avenue southeast into Pontiac to Perry Street and then Perry to Saginaw Street to Woodward while M-58 was routed along Telegraph and Square Lake roads. After the change, US&nbsp;10 turned south from Dixie Highway onto Telegraph and then east onto Square Lake to connect back to Woodward. The old route through downtown was assigned the [[U.S. Route 10 Business (Pontiac, Michigan)|Bus. US&nbsp;10]] moniker and M-58 was decommissioned as a highway designation.<ref name=MSHD60P>{{cite MDOT map |year = 1960 |inset = Pontiac }}</ref><ref name=MSHD61P>{{cite MDOT map |year = 1961 |inset = Detroit Metropolitan Area |sections = A5–B6 }}</ref> Two years later, I-75 was completed to the east of Pontiac, and the M-24 bypass of the city was turned over to local control. The former Bus. M-24 through downtown was renumbered BL I-75 along with a connection along Square Lake Road out to the freeway.<ref name=MSHD63/><ref name=MSHD64P/> The next year, the streets downtown Pontiac were reconfigured and a loop called Wide Track Drive was created to route traffic around the downtown area. The former routing of BL I-75 on Perry Street in the downtown core was replaced by routing the business loops on Wide Track Drive.<ref name=MSHD64P/><ref name=MSHD65P>{{cite MDOT map |year = 1965 |section = L13 }}</ref> Then in 1966, an interchange was built to replace the intersection at Opdyke Road and Square Lake Road.<ref name=MSHD66P>{{cite MDOT map |year = 1966 |link = yes |section = L13 }}</ref><ref name=MSHD67P>{{cite MDOT map |year = 1967 |section = L13 }}</ref>

In 1985, the [[Michigan Department of Transportation]] (MDOT) received permission from the [[American Association of State Highway and Transportation Officials]] to truncate US&nbsp;10 to [[Bay City, Michigan|Bay City]],<ref>{{AASHTO minutes |year = 1985A |access-date = April 6, 2015 }}</ref> and when the change was made the following year, US&nbsp;24 replaced US&nbsp;10 on Telegraph Road north of Square Lake Road, and Bus. US&nbsp;10 through downtown was redesignated Bus. US&nbsp;24, including the segment concurrent with BL I-75.<ref name=MDOT86P>{{cite MDOT map |year = 1986 |inset = Detroit |sections = A6–B7 }}</ref><ref name=MDOT87P>{{cite MDOT map |year = 1987 |inset = Detroit |sections = A6–B7 }}</ref> Saginaw Street south of downtown was renamed as a northern extension of Woodward Avenue, while Wide Track Drive through downtown was renamed as the Woodward Avenue Loop, both in 2000.<ref name=MDOT00P>{{cite MDOT map |year = 2000 |inset = Detroit |sections = A9–B9 }}</ref><ref name=MDOT01P>{{cite MDOT map |year = 2001 |inset = Detroit |sections = A9–B9 }}</ref>

The section of BL I-75 that follows Woodward Avenue has a pair of special designations attached to it. In 1999, it was designated by MDOT as what is now called a [[Pure Michigan Byway]].<ref name=ballou>{{cite news |first=Brian |last= Ballou |date = August 4, 1999 |title = Woodward Winner Storied Avenue Labeled a Michigan Heritage Road: Plans In Works For Continuous Identity From Detroit To Pontiac |url= https://www.newspapers.com/clip/21829009/woodward-winner/ |work= [[Detroit Free Press]] |page= B1 |issn= 1055-2758 |id= {{oclc| 10345127| 137343179}} |access-date = July 12, 2018 |via= [[Newspapers.com]] }}</ref> Three years later, it was named a [[National Scenic Byway]] by the [[Federal Highway Administration]] National Scenic Byways Program on June 13, 2002,<ref name=crains>{{cite news |last = Dietderich |first = Andrew |title = Woodward Group To Add Members South of Eight Mile |work = Crain's Detroit Business |location = Detroit |publisher = [[Crain Communications]] |date = April 19, 2004 |access-date = July 15, 2012 |url = http://www.highbeam.com/doc/1G1-115692757.html |url-access = subscription }}{{dead link|date =February 2019|bot=medic}}{{cbignore|bot=medic }}</ref> the only urban road at the time with that classification.<ref name=MDOTtoday>{{cite magazine |author = Michigan Department of Transportation |date = Winter 2003 |url = http://www.michigan.gov/documents/MDOT_Woodward_Heart_and_Soul_170072_7.pdf |publisher = Michigan Department of Transportation |title = Woodward Avenue: A Road to the Heart and Soul of America |magazine = MDOT Today |pages = 8–9 |access-date = August 30, 2009 |format = PDF |archive-url = https://web.archive.org/web/20121011074925/http://www.michigan.gov/documents/MDOT_Woodward_Heart_and_Soul_170072_7.pdf |archive-date = October 11, 2012 |url-status = live }}</ref> It was later upgraded to [[All-American Road]] status on October 16, 2009.<ref name=tamboer>{{cite news |first = Andrea |last = Tamboer |date = October 28, 2009 |title = Woodward Avenue (M-1) Gets All-American Road Designation |url = http://www.mlive.com/travel/index.ssf/2009/10/woodward_avenue_m-1_gets_all-a.html |work = Live |location = Detroit |publisher = [[Booth Newspapers]] |access-date = July 14, 2012 |archive-url = https://web.archive.org/web/20140723062233/http://www.mlive.com/travel/index.ssf/2009/10/woodward_avenue_m-1_gets_all-a.html |archive-date = July 23, 2014 |url-status = live }}</ref> In 2017, MDOT reconstructed the southern terminus, by replacing the left exit and entrance ramps by right exit and entrance ramps from northbound I-75.

'''Major intersections'''<br/>
{{MIinttop|county=Oakland|length_ref=<ref name=PRFA/>}}
{{MIint
|township=Bloomfield
|ctdab=Oakland
|mile=0.000
|road={{jct|state=MI|I|75|city1=Flint|city2=Detroit}}
|notes=Exit&nbsp;75 on I-75}}
{{MIint
|location_special=[[Bloomfield Township, Oakland County, Michigan|Bloomfield Township]]–[[Pontiac, Michigan|Pontiac]] city line
|mile=1.304
|road=Opdyke Road<br/>Square Lake Road east
|notes=Interchange; western end of freeway stub; Square Lake Road signed southbound only
}}
{{MIint
|township=Bloomfield
|ctdab=Oakland
|mile=2.142
|type=concur
|road={{jct|state=MI|US-Bus|24|dab1=Pontiac|dir1=south|name1=Square Lake Road west}}<br/>{{jct|state=MI|M|1|dir1=south|name1=Woodward Avenue|city1=Detroit}}
|notes=Southern end of Bus. US&nbsp;24 concurrency; northern terminus of M-1
}}
{{jctplace
|state=MI
|location= Pontiac
|lspan=4
|mile=2.424
|place=Southern end of one-way Woodward Avenue Loop
}}
{{MIint
|mile=3.103
|road={{jct|state=MI|M|59|dir1=east|name1=Huron Street}}
|notes=Eastbound direction of M-59}}
{{MIint
|mile=3.183
|type=concur
|road={{jct|state=MI|M|59|dir1=west|name1=University Drive}}
|notes=Southern end of M-59 westbound concurrency around Woodward Avenue Loop
}}
{{MIint
|mile=3.374
|type=concur
|road={{jct|state=MI|US-Bus|24|M|59|dir1=north|dir2=west|dab1=Pontiac|name2=Woodward Avenue Loop|city1=Clarkston|city2=Howell}}
|notes=Northern end of Bus. US&nbsp;24/M-59 west concurrency; BL I-75 exits the Woodard Avenue Loop
}}
{{MIint
|location=Auburn Hills
|lspan=2
|mile=7.892
|mile2=7.903
|road={{jct|state=MI|M|24|dir1=north|city1=Lake Orion}}
|notes=Southern terminus of M-24
}}
{{MIint
|mile=8.362
|mile2=8.384
|road={{jct|state=MI|I|75|city1=Flint|city2=Detroit}}
|notes=Exit&nbsp;81 on I-75
}}
{{jctbtm|keys=concur}}
{{start srbox}}
{{mi browse|previous_type=M|previous_route=24|route=[[Michigan State Trunkline Highway System|MI]]|next_type=US|next_route=25}}
{{s-end}}

==Saginaw==
{{infobox road small
|header_type=former
|state=MI
|type=BL 1957
|route=75
|length_mi= 7.338
|length_ref=<ref name=PRFA/>
|location=[[Saginaw, Michigan|Saginaw]]
|formed=1961<ref name=MSHD61>{{cite MDOT map |year = 1961 |sections = D10, F10, G10, J12 }}</ref><ref name=MSHD62>{{cite MDOT map |year = 1962 |sections = C10, D10, F10, G10, J12 }}</ref>
|deleted=1971<ref name=MDSH71S>{{cite MDOT map |year = 1971 |inset = Saginaw }}</ref><ref name=MDSH72S>{{cite MDOT map |year = 1972 |inset = Saginaw }}</ref>
}}

'''Business Loop&nbsp;I-75''' ('''BL I-75''') was a [[business loop]] in [[Saginaw, Michigan|Saginaw]] that was previously '''Business US Highway&nbsp;23''' ('''Bus. US&nbsp;23'''). It started at an interchange between [[Interstate 75 in Michigan|I-75]]/[[U.S. Route 23 in Michigan|US&nbsp;23]] and [[M-46 (Michigan highway)|M-46]] (Holland Road) in [[Buena Vista Township, Michigan|Buena Vista Township]]. From there, it [[concurrency (road)|ran concurrently]] with M-46 westward into Saginaw. East of 17th Street, the highway split to form a [[one-way pair]]ing with Remington Street, which carried westbound traffic. About three blocks farther west, BL I-75 split from M-46 to follow Genesee Avenue northwesterly into the downtown area. At an intersection between Genesee Avenue, Janes Street and 2nd Avenue, the northbound BL I-75 followed 2nd Avenue while southbound continued on Genesee Avenue. Northbound traffic traveled along 2nd Avenue and Johnson Street to Washington Avenue near the [[Saginaw River]], where the two directions of traffic reunited. Washington Avenue also carried [[M-13 (Michigan highway)|M-13]]/[[M-81 (Michigan highway)|M-81]], and the three designations ran concurrently together northward and parallel to the river. BL I-75/M-13/M-81 curved northeasterly north of downtown, and M-81 left the business loop at an intersection with Veterans Memorial Parkway; BL I-75/M-13 turned north on the parkway and M-81 continued easterly on Washington Avenue. The business loop proceeded northward running parallel to the river and ended at an interchange with I-75/US&nbsp;23 in [[Zilwaukee Township, Michigan|Zilwaukee Township]]; M-13 continued along Bay City Road north of the interchange.<ref name=MDSH71S/>

When the state highway system was signposted in 1919,<ref name=press-1919-09-20/> the north–south highway through Saginaw was part of the original [[M-10 (Michigan highway)|M-10]].<ref name=MSHD19LP/> This highway was later redesignated as part of US&nbsp;23 when the [[United States Numbered Highway System]] was created in 1926.<ref name=USH/> US&nbsp;23 was initially routed on the western side of the Saginaw River through the city, but it was moved in 1929 to run along the eastern side.<ref name=MSHD29-05>{{cite MDOT map |date = 1929-05-01 }}</ref><ref name=MSHD30-01>{{cite MDOT map |date = 1930-01-01 |c-link = yes }}</ref> In 1953, the initial eastern bypass of Saginaw was built as a two-lane highway, and the former routing through downtown was redesignated Bus. US&nbsp;23.<ref name=MSHD53-04>{{cite MDOT map |date = 1953-04-15 |inset = Saginaw }}</ref><ref name=MSHD53-10>{{cite MDOT map |date = 1953-10-01 |inset = Saginaw }}</ref> This bypass was upgraded in 1961 to a full freeway as part of I-75/US&nbsp;23, and the business loop through downtown was redesignated BL I-75.<ref name=MSHD61/><ref name=MSHD62/> In 1971, [[Interstate 675 (Michigan)|I-675]] was completed, and BL I-75 was decommissioned through Saginaw. The segments of the business loop that were concurrent with M-13, M-46 or M-81 remained part of those state highways, but the rest of BL I-75 was returned to local control.<ref name= MDSH71S/><ref name= MDSH72S/>

'''Major intersections'''<br/>
{{MIinttop|county=Saginaw|length_ref=<ref name=PRFA/>|former=yes}}
{{MIint
|location=Buena Vista Township
|mile=0.000
|type=concur
|road={{jct|state=MI|I|75|US|23|location1=[[Mackinac Bridge]]|city2=Flint}}<br/>{{jct|state=MI|M|46|dir1=east|name1=East Holland Road|city1=Richville}}
|notes=Eastern end of M-46 concurrency
}}
{{MIint
|location=Saginaw
|lspan=3
|mile=1.615
|type=concur
|road={{jct|state=MI|M|46|dir1=west|name1=Remington Street|city1=Muskegon}}
|notes=Western end of M-46 concurrency
}}
{{MIint
|mile=3.116
|type=concur
|road={{jct|state=MI|M|13|M|81|dir1=south|dir2=west|name1=Washington Avenue}}
|notes=Southern end of M-13/M-81 concurrency
}}
{{MIint
|mile=5.309
|mile2=5.354
|type=concur
|road={{jct|state=MI|M|81|dir1=east|name1=Washington Avenue|city1=Caro}}
|notes=Northern end of M-81 concurrency
}}
{{MIint
|location=Zilwaukee Township
|mile= 7.356
|mile2=7.338
|type=concur
|road={{jct|state=MI|I|75|US|23|location1=[[Mackinac Bridge]]|city2=Flint}}<br/>{{jct|state=MI|M|13|dir1=north|name1=Bay City Road|city1=Bay City}}
|notes=Northern end of M-13 concurrency
}}
{{jctbtm|keys=concur}}

==Bay City==
{{infobox road small
|state=MI
|type=BS
|route=75
|length_mi= 3.047
|length_ref=<ref name=PRFA/>
|location=[[Bay City, Michigan|Bay City]]
|formed=1961<ref name=MSHD60BC>{{cite MDOT map |year = 1960 |inset = Bay City }}</ref><ref name=MSHD61BC>{{cite MDOT map |year = 1961 |inset = Bay City }}</ref>
}}

'''Business Spur Interstate&nbsp;75''' ('''BS I-75''') is a [[business spur]] running through [[Bay City, Michigan|Bay City]] following a section of the current routing of [[M-25 (Michigan highway)|M-25]] through town. Formerly a full [[business loop]] numbered '''Business Loop Interstate&nbsp;75''' ('''BL I-75'''), it followed what is now [[M-84 (Michigan highway)|M-84]] back to end at I-75/US&nbsp;23 at exit&nbsp;160 south of downtown. The business route also follows streets that previously were numbered '''Business US Highway&nbsp;23''' ('''Bus. US&nbsp;23'''). The spur starts at exit&nbsp;162 on [[Interstate 75 in Michigan|I-75]]/[[U.S. Route 23 in Michigan|US&nbsp;23]] at the same interchange where M-25 and [[U.S. Route 10 in Michigan|US&nbsp;10]] end. BS I-75 [[concurrency (road)|runs concurrently]] along M-25, and for about the first {{convert|1+1/3|mi|km}}, the spur is a four-lane [[freeway]] bounded by residential subdivisions on either side. In [[Bangor Township, Bay County, Michigan|Bangor Township]], the freeway ends and BS I-75/M-25 splits into a [[one-way pair]]ing of Thomas Street (eastbound) and Jenny Street (westbound). These two three-lane streets continue along a residential area on the west side of Bay City. East of intersections with Henry Street, the opposing sides of traffic merge back together near Veterans Memorial Park to cross the [[Saginaw River]] on the four-lane [[Veterans Memorial Bridge (Bay City, Michigan)|Veterans Memorial Bridge]]. On the eastern side of the river, BS I-75/M-25 splits again into the one-way pairing of the three-lane McKinley Street (westbound) and 7th Street (eastbound). Just three blocks east of the river, BS I-75 ends at the intersections with [[M-84 (Michigan highway)|M-84]] (Washington Avenue) in downtown Bay City.<ref name=MDOT14BC>{{cite MDOT map |year = 2014 |inset = Bay City }}</ref><ref name=googleBC>{{google maps |url = https://www.google.com/maps/dir/43.5959818,-83.9468351/43.5950319,-83.8883124/@43.5962691,-83.954566,14819m/data=!3m2!1e3!4b1!4m2!4m1!3e0 |title = Overview Map of BS I-75 in Bay City |access-date = May 11, 2015 |link = no }}</ref> [[Annual average daily traffic|On average each day]] in 2013, 11,678&nbsp;vehicles use the business loop east of the M-13 junction, and 29,391&nbsp;vehicles do so west of the M-84 junction, the lowest and highest traffic counts.<ref name=TMIS/>

When the state highway system was first signposted in 1919,<ref name=press-1919-09-20/> the north–south highway through Bay City was part of the original [[M-10 (Michigan highway)|M-10]], and the east–west highway was numbered as part of [[M-20 (Michigan highway)|M-20]].<ref name=MSHD19LP/> When the [[United States Numbered Highway System]] was created in 1926, M-10 became part of US&nbsp;23, although it was routed on the western side of the Saginaw River. The highway was rerouted to the eastern side of the river in 1929.<ref name=MSHD29-05/><ref name=MSHD30-01/> By early 1941, US&nbsp;23 was rerouted to cross the Saginaw River on the southern side of Bay City, and the former routing along Washington Avenue and Midland Street through downtown was renumbered Bus. US&nbsp;23.<ref name=MSDH40-12>{{cite MDOT map |date = 1940-12-01 |inset= Bay City }}</ref><ref name=MSHD41-03>{{cite MDOT map |date = 1941-03-21 |inset= Bay City }}</ref> When the I-75/US&nbsp;10/US&nbsp;23 freeway bypass west of Bay City opened in late 1961, the former routing of US&nbsp;23 was replaced by M-13 and the former Bus. US&nbsp;23, including connections along the former routing of [[M-47 (Michigan highway)|M-47]] southwest and M-20 west of Bay City, were redesignated as BL I-75.<ref name=MSHD60BC/><ref name=MSHD61BC/> The BL I-75 designation lasted until 1971 when southern half of BL I-75 was removed, converting the business loop into a business spur; the southern section was renumbered as part of an M-84 extension, and BS I-75 would then run along the section concurrent with M-25 only.<ref name=MDSH71BC>{{cite MDOT map |year = 1971 |inset= Bay City }}</ref><ref name=MDSH72BC>{{cite MDOT map |year = 1972 |inset= Bay City }}</ref>

'''Major Intersections'''<br/>
{{MIinttop|county=Bay|length_ref=<ref name=PRFA/>}}
{{MIint
|location= Monitor Township
|mile=0.000
|mile2=0.014
|type=concur
|road={{jct|state=MI|I|75|US|23|location1=[[Mackinac Bridge]]|city2=Saginaw}}<br>{{jct|state=MI|US|10|dir1=west|city1=Midland}}<br/>{{jct|state=MI|M|25|dir1=east|city1=Bay City}}
|notes=Western end of M-25 concurrency; exit&nbsp;162 on I-75/US&nbsp;25; eastern terminus of US&nbsp;10
}}
{{jctplace
|state=MI
|location=Bangor Township
|ctdab=Bay
|mile=1.306
|place=Eastern end of freeway
}}
{{MIint
|location=Bay City
|lspan=3
|mile=1.690
|type=concur
|road={{jct|state=MI|M|13|Tour|LHCT|dir2=north|name2=Euclid Avenue|city1=Standish|city2=Saginaw}}
|notes=Western end of LHCT concurrency
}}
{{MIint
|mile=2.589
|type=incomplete
|road=John F. Kennedy Drive
|notes= Westbound exit only
}}
{{MIint
|mile=3.047
|type=concur
|road={{jct|state=MI|M|25|Tour|LHCT|dir1=east|dir2=east}}<br/>{{jct|state=MI|M|84|dir1=south|name1=Washington Avenue|city1=Saginaw}}
|notes=Eastern end of M-25/LHCT concurrency
}}
{{jctbtm|keys=concur,incomplete}}

==West Branch==
{{infobox road small
|state=MI
|type=BL
|route=75
|length_mi=
|length_ref=<ref name=PRFA/>
|location=[[West Branch, Michigan|West Branch]]
|formed=1973<ref name=MDSH73>{{cite MDOT map |year = 1973 |sections= G10, H11 }}</ref><ref name=MDSHT74>{{cite MDOT map |year = 1974 |sections= G10, H11 }}</ref>
}}

'''Business Loop Interstate&nbsp;75''' ('''BL I-75''') is a [[business loop]] running through [[West Branch, Michigan|West Branch]] that was originally numbered '''Business M-76''' ('''Bus. M-76'''). It starts at exit&nbsp;212 south on [[Interstate 75 in Michigan|I-75]] south of West Branch. From that interchange, BL I-75 runs northward along Cook Road in [[Horton Township, Michigan|Horton]] and [[West Branch Township, Ogemaw County, Michigan|West Branch]] townships past an outlet mall. North of the mall, the roadway has two lanes, one in each direction plus an intermittent center turn lane, and it curves first to the northeast through a rural section of the townships, and then after intersecting Old 76 Road, it turns northwesterly through a commercial area. On the eastern city limits, BL I-75 turns due west and [[concurrency (road)|runs concurrently]] with [[M-55 (Michigan highway)|M-55]] on the four-lane Houghton Avenue through downtown West Branch. On the western side of downtown, the business loop intersects the northern end of [[M-30 (Michigan highway)|M-30]] and narrows to two lanes. BL I-75/M-55 continues out of town, running past more businesses before meeting I-75 at exit&nbsp; 215. At that interchange, BL I-75 ends, and M-55 merges onto the freeway.<ref name=MDOT14WB>{{cite MDOT map |year = 2014 |section= H11 }}</ref><ref name=googleWB>{{google maps |url= https://www.google.com/maps/dir/44.243668,-84.2256076/44.2762895,-84.2842652/@44.2585087,-84.2874805,14655m/data=!3m1!1e3!4m9!4m8!1m5!3m4!1m2!1d-84.2234215!2d44.2757823!3s0x8820fe4bd6383875:0x7eddb9cc409b3cb2!1m0!3e0 |title = Overview Map of BL I-75 in West Branch |access-date = May 11, 2015 |link = no }}</ref> [[Annual average daily traffic|On average each day]] in 2013, 10,682&nbsp;vehicles use the business loop near the southern I-75 interchange, and 15,399&nbsp;vehicles do so between the M-55 junction and 5th Street in downtown West Branch, the lowest and highest traffic counts.<ref name=TMIS/>

When the state highway system was signposted in 1919,<ref name=press-1919-09-20/> the highway running northwest–southeast through West Branch was numbered [[M-76 (Michigan highway)|M-76]] and the east–west highway was M-55.<ref name=MSHD19LP/> In the early 1970s, M-76 was being converted into a freeway between [[Standish, Michigan|Standish]] and the [[Grayling, Michigan|Grayling]] area. In 1970, the freeway was built as far as the present-day exit&nbsp;212, and the connection along Cook Road was built to allow M-76 to connect between the new freeway and its former routing.<ref name=MDSH70WB>{{cite MDOT map |year = 1970 |section = H11 }}</ref><ref name=MDSH71WB/> The next year, this freeway was completed to bypass West Branch to the south and west. The former route of M-76 through town with the connection along Cook Road was renumbered Bus. M-76.<ref name=MDSH71WB>{{cite MDOT map |year = 1971 |section = H11 }}</ref><ref name=MDSH72WB>{{cite MDOT map |year = 1972 |section = H11 }}</ref> Two years later, I-75 was finished in the state,<ref name=TCRE1973-11-02>{{cite news |url = https://www.newspapers.com/clip/21756812/around_the_state_west_branch/ |title = Around the State: West Branch |work = Traverse City Record-Eagle |agency = United Press International |date = November 2, 1973 |page = 3 |access-date = July 10, 2018 |oclc = 30098364 |via = Newspapers.com }} </ref> and the M-76 designation was decommissioned. The former Bus. M-76 was redesignated as BL I-75 at the same time.<ref name=MDSH73/><ref name=MDSHT74/>

'''Major intersections'''<br/>
{{MIinttop|county=Ogemaw|ref=<ref name=PRFA/>}}
{{MIint
|location=Horton Township
|mile=0.000
|road={{jct|state=MI|I|75|location1=[[Mackinac Bridge]]|city=Saginaw}}<br/>Cook Road
|notes=Roadway continues southward as Cook Road
}}
{{MIint
|township=West Branch
|ctdab=Ogemaw
|lspan=2
|mile=1.552
|road=Old 76
|notes=Formerly [[M-76 (Michigan highway)|M-76]]
}}
{{MIint
|mile= 2.495
|type=concur
|road={{jct|state=MI|M|55|dir1=east|city1=Tawas City}}
|notes=Eastern end of M-55 concurrency
}}
{{MIint
|location=West Branch
|mile= 3.593
|road={{jct|state=MI|M|30|dir1=south|city1=Beaverton}}
|notes=Northern terminus of M-30
}}
{{MIint
|location=Ogemaw Township
|mile=5.525
|type=concur
|road={{jct|state=MI|I|75|M|55|dir2=west|location1=[[Mackinac Bridge]]|city2=Saginaw|city3=Houghton Lake}}
|notes=Western end of M-55 concurrency
}}
{{jctbtm|keys=concur}}

==Roscommon==
{{infobox road small
|state=MI
|type=BL
|route=75
|length_mi= 6.935
|length_ref=<ref name=PRFA/>
|location=[[Roscommon, Michigan|Roscommon]]
|formed=1973<ref name=MDSH73/><ref name=MDSHT74/>
}}

'''Business Loop Interstate&nbsp;75''' ('''BL I-75''') is a [[business loop]] running through [[Roscommon, Michigan|Roscommon]]. Starting at exit&nbsp;239 along [[Interstate 75 in Michigan|I-75]], the business loop [[concurrency (road)|runs concurrently]] with [[M-18 (Michigan highway)|M-18]] northward along the two-lane Roscommon Road through rural [[Northern Michigan]] woodlands. When BL I-75/M-18 enters the village of Roscommon, it follows Lake Street northeasterly into downtown. At the intersection with 5th Street, BL I-75 turns northwesterly and separates from M-18. In the village, the business loop has three lanes, one in each direction with a center turn lane. The business loop continues past several businesses and exits the village as a two-lane road. BL I-75 curves to run due west along the [[Roscommon County, Michigan|Roscommon]]–[[Crawford County, Michigan|Crawford]] county line on Federal Highway. At exit&nbsp;244 on I-75, the business loop terminates while following the county line.<ref name=MDOT14R>{{cite MDOT map |year = 2014 |section = H10 }}</ref><ref name=googleR>{{google maps |url = https://www.google.com/maps/dir/44.4566864,-84.6061984/Roscommon,+MI+48653/44.5113818,-84.6632323/@44.4839563,-84.6645943,14599m/data=!3m1!1e3!4m10!4m9!1m0!1m5!1m1!1s0x882040b537f8a723:0x83306bc51315cf37!2m2!1d-84.5919682!2d44.4983504!1m0!3e0 |title = Overview Map of BL I-75 in Roscommon |access-date = May 11, 2015 |link = no }}</ref> [[Annual average daily traffic|On average each day]] in 2013, 1,531&nbsp;vehicles use the business loop near the northern I-75 interchange, and 5,987&nbsp;vehicles do so in downtown Roscommon south of the M-18 junction, the lowest and highest traffic counts.<ref name=TMIS/>

When the state highway system was originally signposted in 1919,<ref name=press-1919-09-20/> the highway running northwest–southeast through Roscommon was numbered [[M-76 (Michigan highway)|M-76]].<ref name=MSHD19LP/> In 1949, M-18 was extended north into Roscommon and then west along M-76.<ref name=MSHD49-04>{{cite MDOT map |date = 1949-04-15 |sections = G10–H10 }}</ref><ref name=MSHD49-07>{{cite MDOT map |date = 1949-07-01 |sections = G10–H10 }}</ref> During the early 1970s, M-76 was being converted into a freeway to be used as part of I-75. In 1971, I-75 was completed southward from the [[Grayling, Michigan|Grayling]] area to what is now exit&nbsp;239. Two years later, I-75 was completed between Roscommon and [[West Branch, Michigan|West Branch]],<ref name=TCRE1973-11-02/> and M-76 between the two communities was decommissioned. At the same time, M-18 was realigned to northeasterly out of Roscommon instead of following M-76 toward Grayling. BL I-75 was commissioned at this time to overlap M-18 from the freeway north into Roscommon and to replace the former M-18/M-76 west of the village to the new freeway.<ref name=MDSH73/><ref name=MDSHT74/>

'''Major intersections'''<br/>
{{MIinttop|length_ref=<ref name=PRFA/>}}
{{MIint
|county=Roscommon
|cspan=2
|township=Higgins
|mile=0.000
|type=concur
|road={{jct|state=MI|I|75|location1=[[Mackinac Bridge]]|city2=Saginaw}}<br/>{{jct|state=MI|M|18|dir1=south|city1=Houghton Lake}}
|notes=Southern end of M-18 concurrency; exit&nbsp;239 on I-75
}}
{{MIint
|location=Roscommon
|mile=3.026
|type=concur
|road={{jct|state=MI|M|18|dir1=north}}
|notes=Northern end of M-18 concurrency
}}
{{MIint
|county1=Roscommon
|county2=Crawford
|location_special=[[Gerrish Township, Michigan|Gerrish]]–[[Beaver Creek Township, Michigan|Beaver Creek]] township line
|mile= 6.935
|road={{jct|state=MI|I|75|location1=[[Mackinac Bridge]]|city2=Saginaw}}
|notes=Exit&nbsp;244 on I-75
}}
{{jctbtm|keys=concur}}

==Grayling==
{{infobox road small
|state=MI
|type=BL
|route=75
|length_mi= 5.823
|length_ref=<ref name=PRFA/>
|location=[[Grayling, Michigan|Grayling]]
|formed=1961<ref name=MSHD61/><ref name=MSHD62/>
}}

'''Business Loop Interstate&nbsp;75''' ('''BL I-75''') is a [[business loop]] running through [[Grayling, Michigan|Grayling]]. The southern end is at a partial interchange at exit&nbsp;254 on [[Interstate 75 in Michigan|I-75]]; only northbound I-75 traffic can access northbound BL I-75, and southbound BL I-75 traffic can only access southbound I-75. From this interchange, the business loop runs northward as a five-lane divided roadway through a commercial area and past the Grayling Golf Club. At the intersection with Huron Street (South Down River Road), BL I-75 merges with [[M-72 (Michigan highway)|M-72]]. The two highways [[concurrency (road)|run concurrently]] and turn northwesterly along the five-lane undivided James Street. BL I-75/M-72 narrows to three lanes and crosses the [[Au Sable River (Michigan)|Au Sable River]] and runs for about {{convert|3/4|mi|km}} before intersecting Lake Street in downtown Grayling. There, M-72 turns southwesterly onto Lake Street, separating from the business loop. At the same intersection, M-93 turns north and merges with BL I-75 as the two run concurrently on the three-lane McClellan Street. BL I-75/M-93 intersects County Road [[F-32 (Michigan county highway)|F-32]] (North Down River Road) and then passes the [[Camp Grayling]] Airfield. North of the airfield, the highway narrows to two lanes and curves to the northwest, exiting the city. At the intersection with [[U.S. Route 27 in Michigan|Old 27]] and Hartwick Pines Road, BL I-75/M-93 turns northeasterly onto the latter. They continue running concurrently to exit&nbsp;259 on I-75 where the BL I-75 designation terminates. M-93 continues along Hartwick Pines Road north of the interchange.<ref name=MDOT14GR>{{cite MDOT map |year = 2014 |section = G10 }}</ref><ref name=googleGR>{{google maps |url = https://www.google.com/maps/dir/44.6430599,-84.7069631/44.6640288,-84.7181946/44.7155793,-84.698297/@44.6793039,-84.7493039,14550m/data=!3m1!1e3!4m2!4m1!3e0 |title = Overview Map of BL I-75 in Grayling |access-date = May 10, 2015 |link = no }}</ref> All of BL I-75 through Grayling is a part of the Strategic Highway Network, a component of the [[National Highway System (United States)|National Highway System]],<ref name=NHS-MI>{{cite map |author = Michigan Department of Transportation |location = Lansing |title = National Highway System, Michigan |date = April 23, 2006 |publisher = Michigan Department of Transportation |url = http://www.michigan.gov/documents/MDOT_NHS_Statewide_150626_7.pdf |format = PDF |scale = Scale not given |archive-url = https://web.archive.org/web/20141006073353/http://www.michigan.gov/documents/MDOT_NHS_Statewide_150626_7.pdf |archive-date = October 6, 2014 |access-date = October 7, 2008 }}</ref> a network of roads important to the country's economy, defense, and mobility.<ref name=NHS>{{cite web |first1 = Stefan |last1 = Natzke |first2 = Mike |last2 = Neathery |first3 = Kevin |last3 = Adderly |url = http://www.fhwa.dot.gov/planning/national_highway_system/ |title = What is the National Highway System? |work = National Highway System |publisher = [[Federal Highway Administration]] |date = June 20, 2012 |access-date = July 1, 2012 |name-list-style = amp }}</ref> [[Annual average daily traffic|On average each day]] in 2013, 1,407&nbsp;vehicles use the business loop between Old 27 and I-75, and 18,467&nbsp;vehicles do so in downtown Grayling south of the M-72 junction, the lowest and highest traffic counts, respectively.<ref name=TMIS/>

When the state highway system was originally signposted in 1919,<ref name=press-1919-09-20/> the north–south highway through Grayling was part of the original [[M-14 (Michigan highway)|M-14]]. At that time, M-93 was only a spur from downtown Grayling to the future Camp Grayling.<ref name=MSHD19LP/> M-14 was later redesignated as part of [[U.S. Route 27 in Michigan|US Highway&nbsp;27]] (US&nbsp;27) in 1926.<ref name=USH/> By 1932, M-93 was extended northward through Grayling to the state park.<ref name=MSDH32-10>{{cite MDOT map |date = 1932-10-01 |section = G10 }}</ref> In 1940, M-72 was extended through the Grayling area.<ref name=MSHD40-07/><ref name=MSDH40-12/> I-75 in the Grayling area opened in 1961 and, the former routing of US&nbsp;27 through Grayling northward to Hartwick Pines Road back to I-75 was redesignated BL I-75.<ref name=MSHD61/><ref name=MSHD62/>

'''Major intersections'''<br/>
{{MIinttop|county=Crawford|length_ref=<ref name=PRFA/>}}
{{MIint
|location=Grayling Township
|mile=0.000
|type=incomplete
|road={{jct|state=MI|I|75|dir1=south|city1=Saginaw}}
|notes=Southbound exit and northbound entrance only; exit&nbsp;254 on I-75
}}
{{MIint
|location=Grayling
|lspan=3
|mile=0.677
|type=concur
|road={{jct|state=MI|M|72|dir1=east|city1=Mio|name1=Huron Street}}
|notes=Southern end of M-72 concurrency
}}
{{MIint
|mile=1.387
|type=concur
|road={{jct|state=MI|M|72|M|93|dir1=west|dir2=south|city1=Traverse City|name2=Lake Street}}
|notes=Northern end of M-72 concurrency; southern end of M-93 concurrency
}}
{{MIint
|mile=1.842
|road={{jct|state=MI|CDH|F-32|dir1=east|name1=North Down River Road}}
|notes=Western terminus of F-32
}}
{{MIint
|location=Grayling Township
|mile= 5.823
|type=concur
|road={{jct|state=MI|I|75|location=[[Mackinac Bridge]]|city2=Saginaw}}<br/>{{jct|state=MI|M|93|dir1=north|location1=[[Hartwick Pines State Park]]}}
|notes=Northern end of M-93 concurrency; exit&nbsp;259 on I-75; roadway continues as M-93
}}
{{jctbtm|keys=concur,incomplete}}


==Gaylord==
{{infobox road small
|state=MI
|type=BL
|route=75
|length_mi= 3.391
|length_ref=<ref name=PRFA/>
|location=[[Gaylord, Michigan|Gaylord]]
|formed=1986<ref name=MDOT86G>{{cite MDOT map |year = 1986 |section = F10 }}</ref><ref name=MDOT87G>{{cite MDOT map |year = 1987 |section = F10 }}</ref>
}}
'''Business Loop Interstate&nbsp;75''', or '''BL I-75''' is a [[business loop]] running through [[Gaylord, Michigan|Gaylord]]. The loop starts at exit&nbsp;279 on [[Interstate 75 in Michigan|I-75]] in [[Bagley Township, Michigan|Bagley Township]] south of Gaylord. The highway follows the five-lane Otsego Avenue northward from the freeway into the city and though a commercial area. Otsego Avenue jogs eastward slightly south of 2nd Street, and then intersects [[M-32 (Michigan highway)|M-32]] (Main Street) in downtown Gaylord. BL I-75 turns west onto the five-lane Main Street and [[concurrency (road)|runs concurrently]] with M-32 through downtown. About five blocks each of that turn, BL I-75/M-32 meets I-75 at exit&nbsp;282; BL I-75 ends while M-32 continues westward.<ref name=MDOT14G>{{cite MDOT map |year = 2014 |section = F10 }}</ref><ref name=googleG>{{google maps |url = https://www.google.com/maps/dir/44.9882287,-84.6769973/45.0274393,-84.689648/@45.0080179,-84.702879,7233m/data=!3m1!1e3!4m9!4m8!1m5!3m4!1m2!1d-84.6773224!2d45.0274041!3s0x4d3545f677863a07:0x51635834585b0464!1m0!3e0 |title = Overview Map of BL I-75 in Gaylord |access-date = May 10, 2015 |link = no }}</ref> [[Annual average daily traffic|On average each day]] in 2013, 8,289&nbsp;vehicles use the business loop south of the M-32 junction, and 23,436&nbsp;vehicles do so in downtown Gaylord along the M-32 concurrency, the lowest and highest traffic counts.<ref name=TMIS/>

When the state highway system was first signposted in 1919,<ref name=press-1919-09-20/> the main highway running north–south through Gaylord was part of the original [[M-14 (Michigan highway)|M-14]].<ref name=MSHD19LP/> This was renumbered as part of [[U.S. Route 27 in Michigan|US Highway&nbsp;27]] (US&nbsp;27) in 1926 after the [[United States Numbered Highway System]] was formed.<ref name=USH/> I-75 was completed and US&nbsp;27 was removed through the Gaylord area in 1962.<ref name= HP1961-09-01>{{cite news |title = Bypasses Gaylord |work = The Herald-Press |location = St. Joseph, Michigan |agency = Associated Press |date = September 1, 1962 |page = 3 |oclc = 10117184 |access-date = July 10, 2018 |url = https://www.newspapers.com/clip/21753517/bypasses_gaylord/ |via = Newspapers.com }} </ref> The business loop was not created at that time, however.<ref name=MSHD61/><ref name=MSHD62/> Instead, it was created in 1986.<ref name=MDOT86G/><ref name=MDOT87G/><!-- at the request of local civic leaders.-->

'''Major intersections'''<br/>
{{MIinttop|county=Otsego|length_ref=<ref name=PRFA/>}}
{{MIint
|location=Bagley Township
|mile=0.000
|road={{jct|state=MI|I|75|location1=[[Mackinac Bridge]]|city2=Saginaw}}<br/>Old 27 south
|notes=Exit&nbsp;279 on I-75; roadway continues south as Old 27
}}
{{MIint
|location=Gaylord
|lspan=2
|mile=2.868
|type=concur
|road={{jct|state=MI|M|32|dir1=east|city1= Alpena}}
|notes=Eastern end of M-32 concurrency
}}
{{MIint
|mile=3.391
|type=concur
|road={{jct|state=MI|I|75|location1=[[Mackinac Bridge]]|city2=Saginaw}}<br/>{{jct|state=MI|M|32|dir1=west|city1=East Jordan}}
|notes=Western end of M-32 concurrency; exit&nbsp;282 on I-75
}}
{{jctbtm|keys=concur}}

==Indian River==
{{infobox road small
|header_type=UC
|state=MI
|type=BL
|route=75
|length_mi= 3.975
|length_ref=<ref name=PRFA/>
|location=[[Indian River, Michigan|Indian River]]
|history=Proposed in 2015–17 to {{abbr|CCRC|Cheboygan County Road Commission}} and [[Michigan Department of Transportation|MDOT]]
}}
'''Business Loop Interstate&nbsp;75''' ('''BL I-75''') is a proposed [[business loop]] that would run through [[Indian River, Michigan|Indian River]].<ref name=hahn2017-03-03>{{cite news |first = Kortny |last = Hahn |date = March 3, 2017 |title = Road Comm. Eyes I-75 Business Loop |url = http://www.hollandsentinel.com/news/20170303/road-comm-eyes-i-75-business-loop |work = [[Holland Sentinel]] |access-date = March 10, 2017 }}</ref> It would start at exit&nbsp;310 on [[Interstate 75 in Michigan|I-75]] in [[Tuscarora Township, Michigan|Tuscarora Township]] and follow [[M-68 (Michigan highway)|M-68]] across the [[North Central State Trail]] near the [[Sturgeon River (Michigan)|Sturgeon River]]. In the community of Indian River, M-68 turns southwesterly on South Straits Highway, and BL I-75 would turn northward into downtown. The business loop would run through downtown, passing several businesses, and cross the Indian River on the north side of the business district. North of the river, South Straits Highway continues to parallel the North Central State Trail and passes the Indian River Golf Club. North of the club, the roadway runs through forest land and past the occasional business before meeting I-75 at exit 310. This interchange is the southern terminus of [[M-27 (Michigan highway)|M-27]], and it would serve as the future northern terminus of BL I-75.<ref name=googleIR>{{google maps |url = https://www.google.com/maps/dir/45.401228,-84.6046669/45.4043014,-84.6157391/45.452129,-84.610203/@45.4272422,-84.6277477,7294m/data=!3m2!1e3!4b1!4m10!4m9!1m0!1m5!3m4!1m2!1d-84.6102106!2d45.4193811!3s0x4d3576eada5cc665:0xbd07267b81220892!1m0!3e0 |title = Overview Map of Proposed BL I-75 in Indian River |access-date = March 10, 2017 |link = no }}</ref>

Prior to the construction of the I-75 freeway, South Straits Highway was the route of [[U.S. Route 27 in Michigan|US Highway&nbsp;27]] (US&nbsp;27) through the Indian River area. In November 1960, sections of I-75 freeway opened from Indian River north to the southern Mackinac Bridge approaches in Mackinaw City,<ref name=blade1960>{{cite news |title = Michigan To Open 35 More Miles of Freeway |url = https://news.google.com/newspapers?id=2rlOAAAAIBAJ&sjid=CAEEAAAAIBAJ&pg=2713,1527983&dq=michigan+open+%7C+construction+interstate-75&hl=en |work = [[Toledo Blade|The Blade]] |location = Toledo, Ohio |agency = Associated Press |date = November 8, 1960 |page = 19 |oclc = 12962717 |access-date = March 22, 2013 |via = [[Google News]] }}</ref> By the end of the following year, I-75 was completed between [[Gaylord, Michigan|Gaylord]] and [[Grayling, Michigan|Grayling]]. US&nbsp;27 was truncated to terminate south of Grayling, and the former route through Indian River and Gaylord was redesignated "To I-75" on maps.<ref name=MSHD61IR>{{cite MDOT map |year = 1961 |sections = F10–G10 }}</ref><ref name=MSHD62IR>{{cite MDOT map |year = 1962 |sections = F10–G10 }}</ref> In 1962, the remaining freeway bypass of Indian River was completed.<ref>{{cite news |first = Michael |last = Jones |date = February 19, 2008 |title = Five Nuggets of Knowledge about I-75 |url = http://articles.petoskeynews.com/2008-02-19/state-road_24054329 |work = [[Gaylord Herald Times]] |access-date = August 15, 2013 |archive-url = https://web.archive.org/web/20150402145037/http://articles.petoskeynews.com/2008-02-19/state-road_24054329 |archive-date = April 2, 2015 |url-status = dead }}</ref> At that time, South Straits Highway through Indian River between M-68 and M-27 was turned over to local control as a county road.<ref name=MSHD62IR/><ref name=MSHD63IR>{{cite MDOT map |year = 1962 |section = F10 }}</ref> M-68 was first designated between Indian River and [[Alanson, Michigan|Alanson]] by 1936,<ref name=MSHD36-06IR>{{cite MDOT map |date = 1936-06-01 |link = yes |c-link = yes |section = F10 }}</ref> and eastward by 1946 toward [[Afton, Michigan|Afton]].<ref name=MSHD46-07IR>{{cite MDOT map |date = 1946-07-01 |sections = F10–F11 }}</ref>

A business loop for Indian River was first proposed to the Cheboygan County Road Commission (CCRC) in June 2015. At the time, the road commission had recently placed the bridge on South Straits Highway over the Indian River with a new structure up to [[Michigan Department of Transportation]] (MDOT) standards and was repaving the roadway north of the river to the I-75 interchange.<ref name=hahn2015-06-19>{{cite news |first = Kortny |last = Hahn |date = June 19, 2015 |title = Resident Proposes I-75 Business Loop in Indian River |url = http://www.cheboygannews.com/article/20150619/NEWS/150619033 |work = [[Cheboygan Daily Tribune]] |access-date = March 10, 2017 }}</ref> The CCRC held a community forum in June 2016, and many local residents and businesses supported the designation at the time.<ref name=gordon>{{cite news |first = Michael |last = Gordon |date = June 2, 2016 |title = Community Meeting Held over Possible Business Loop |url = http://upnorthlive.com/news/local/community-meeting-held-over-possible-business-loop |work = Up North Live |location = Traverse City, MI |publisher = [[WPBN-TV]] |access-date = March 10, 2017 }}</ref> The Tuscarora Township Board and Downtown Development Authority have expressed interesting in paying for the necessary signage should MDOT and the CCRC move forward to apply for the designation from the [[American Association of State Highway and Transportation Officials]]. The township board has passed a resolution in support of the BL I-75 designation.<ref name=hahn2017-03-03 />

'''Major intersections'''<br/>
{{MIinttop|county=Cheboygan|length_ref=<ref name=PRFA/>|future=yes}}
{{MIint
|location=Tuscarora Township
|mile=0.000
|mile2=0.287
|type=concur
|road={{jct|state=MI|I|75|location1=[[Mackinac Bridge]]|city2=Saginaw}}<br/>{{jct|state=MI|M|68|dir1=east|city1=Rogers City}}
|notes=Eastern end of M-68 concurrency; exit&nbsp;310 on I-75; roadway continues eastward as M-68
}}
{{MIint
|location=Indian River
|mile=0.593
|type=concur
|road={{jct|state=MI|M|68|dir1=west|city1= Alanson}}
|notes=Western end of M-32 concurrency
}}
{{MIint
|location=Tuscarora Township
|mile=3.413
|mile2=3.975
|road={{jct|state=MI|I|75|location1=[[Mackinac Bridge]]|city2=Saginaw}}<br/>{{jct|state=MI|M|27|dir1=north|city1=Topinabee|city2=Cheboygan}}
|notes=Exit&nbsp;313 on I-75; southern terminus of M-27; roadway continues northward as M-27
}}
{{jctbtm|keys=concur}}

==St. Ignace==
{{infobox road small
|state=MI
|type=BL
|route=75
|location=[[St. Ignace, Michigan|St. Ignace]]
|length_mi=4.719
|length_ref=<ref name=PRFA/>
|formed=1960<ref name=MSHD61/><ref name=MSHD60SI>{{cite MDOT map |year = 1960 |section = D10 }}</ref>
|tourist=[[File:Lake Huron Circle Tour.svg|20px|alt=|link =]] [[Lake Huron Circle Tour]]
}}

'''Business Loop Interstate&nbsp;75''' ('''BL I-75''') is a [[business loop]] running through [[St. Ignace, Michigan|St. Ignace]]. The loop starts at exit&nbsp;344 on [[Interstate 75 in Michigan|I-75]] as the continuation of [[U.S. Route 2 in Michigan|US Highway&nbsp;2]] (US&nbsp;2) into downtown. The highway carries the [[Lake Huron Circle Tour]] (LHCT). It runs along a four-lane roadway on the north side of [[Straits State Park]] and curves northward into downtown St. Ignace along State Street. BL I-75 has three lanes and runs along the lakefront past the marina and docks for [[Mackinac Island]] ferry services. It widens back to four lanes to follow the curve of [[East Moran Bay]] and then turns inland past several hotels situated on a point jutting into the bay. North of the point, BL I-75 follows the [[Lake Huron]] shoreline past the [[Mackinac County Airport]]. North of the airport, the adjacent properties are primarily residential with a few tourist-oriented businesses. The business loop intersects County Road [[H-63 (Michigan county highway)|H-63]] (Mackinac Trail) and comes to an end near [[Castle Rock (Michigan)|Castle Rock]] at exit&nbsp;348 on I-75 in [[St. Ignace Township, Michigan|St. Ignace Township]].<ref name=MDOT14SI>{{cite MDOT map |year = 2014 |section = D10 }}</ref><ref name=googleSI>{{google maps |url = https://www.google.com/maps/dir/45.8575207,-84.7278112/45.9070428,-84.7396802/@45.8822262,-84.746302,7122m/data=!3m1!1e3!4m9!4m8!1m5!3m4!1m2!1d-84.7303707!2d45.8944344!3s0x4d35f64b7b69e45d:0x9fa881b43f911a81!1m0!3e0 |title = Overview Map of BL I-75 in St. Ignace |access-date = May 10, 2015 |link = no }}</ref> [[Annual average daily traffic|On average each day]] in 2013, 4,327&nbsp;vehicles use the business loop near the northern I-75 interchange, and 8,819&nbsp;vehicles do so near the southern I-75 interchange, the lowest and highest traffic counts.<ref name=TMIS/>

The first state highway through St. Ignace was an extension of [[U.S. Route 31 in Michigan|US&nbsp;31]] that was added by the end of 1927.<ref name=MSHD27-12/> In 1936, US&nbsp;2 was realigned to run into downtown St. Ignace from the west and replaced US&nbsp;31 through town.<ref name=MSHD36-06/><ref name=MSHD36-12/> The business loop was commissioned in 1960 when the I-75/US&nbsp;2 freeway opened, and the former route of US&nbsp;2 through downtown was renumbered BL I-75.<ref name=MSHD61/><ref name=MSHD60SI/>

'''Major intersections'''<br/>
{{MIinttop|county=Mackinac|length_ref=<ref name=PRFA/>}}
{{MIint
|location=St. Ignace
|lspan=2
|mile=0.000
|type=concur
|road={{jct|state=MI|I|75|Tour|GLCT|city1=Sault Ste. Marie|location1=[[Mackinac Bridge]]}}<br/>{{jct|state=MI|US|2|Tour|LMCT|dir1=west|dir2=west|city1=Escanaba|city2=Manistique}}
|notes=Southern end of LHCT concurrency; eastern terminus of US&nbsp;2; exit&nbsp;344 on I-75
}}
{{MIint
|mile=0.460
|road=Ferry Lane
|notes= Former [[M-122 (Michigan highway)|M-122]]
}}
{{MIint
|location=St. Ignace Township
|lspan=2
|mile=4.396
|road={{jct|state=MI|CDH|H-63|dir1=north|name1=Mackinac Trail|city1=Sault Ste. Marie}}
|notes=Southern terminus of H-63
}}
{{MIint
|mile=4.719
|type=concur
|road={{jct|state=MI|I|75|Tour|LHCT|dir2=north|city1=Sault Ste. Marie|location2=[[Mackinac Bridge]]}}
|notes=Northern end of LHCT concurrency; exit&nbsp;348 on I-75
}}
{{jctbtm|keys=concur}}

==Sault Ste. Marie==
{{infobox road small
|state=MI
|type=BS
|route=75
|location=[[Sault Ste. Marie, Michigan|Sault Ste. Marie]]
|length_mi=5.867
|length_ref=<ref name=PRFA/>
|formed=1962<ref name=MSHD63/><ref name=MSHD62/>
}}

'''Business Spur Interstate&nbsp;75''' ('''BS I-75''') is a [[business spur]] running through [[Sault Ste. Marie, Michigan|Sault Ste. Marie]]. It starts at exit&nbsp;392 on [[Interstate 75 in Michigan|I-75]] on the south side of the city. From that interchange, it runs eastward along the five-lane-wide 3&nbsp;Mile Road and intersects the northern end of County Road [[H-63 (Michigan county highway)|H-63]] (Mackinac Trail) before curving northeasterly. The spur runs through commercial areas and intersects the northern end of [[M-129 (Michigan highway)|M-129]] ([[Dixie Highway]]) before turning due north along Ashmun Street near the [[Sault Ste. Marie Municipal Airport]]. Ashmun Street narrows to four lanes north of 10th Avenue and regains a center turn lane at Adams Avenue. BS I-75 turns northeasterly past Easterday Avenue and runs to the east of the campus of [[Lake Superior State University]], crossing the [[Edison Sault Power Canal]]. At Portage Avenue south of the [[Soo Locks]], BS I-75 turns southeasterly to follow Portage Avenue along the [[St. Marys River (Michigan–Ontario)|St. Marys River]]. The business spur crosses the canal again just upstream from its mouth. Portage Avenue continues through residential neighborhoods on the east side of Sault Ste. Marie, following the river. BS I-75 ends at the entrance to the [[Sugar Island (Michigan)|Sugar Island]] Ferry Dock across from the Sault Ste. Marie Country Club.<ref name=MDOT14SSM>{{cite MDOT map |year = 2014 |inset = Sault Ste. Marie }}</ref><ref name=googleSSM>{{google maps |url = https://www.google.com/maps/dir/46.4629406,-84.382856/46.4857449,-84.3035069/@46.4815867,-84.3797848,14090m/data=!3m1!1e3!4m9!4m8!1m5!3m4!1m2!1d-84.3460112!2d46.5002158!3s0x4d3639a5788af531:0x3aa61cd4d27f22d4!1m0!3e0 |title = Overview Map of BS I-75 in Sault Ste. Marie |access-date = May 10, 2015 |link = no }}</ref> [[Annual average daily traffic|On average each day]] in 2013, 1,433&nbsp;vehicles used the business spur near the I-75 interchange, and 19,962&nbsp;vehicles do so north of the M-129 junction, the lowest and highest traffic counts.<ref name=TMIS/>

When the state highway system was first signposted in 1919,<ref name=press-1919-09-20/> the north–south state highway in Sault Ste. Marie was numbered [[M-12 (Michigan highway)|M-12]] in 1919.<ref name=MSHD19UP>{{cite MDOT map |date = 1919-07-01U }}</ref> It was renumbered as part of US&nbsp;2 in 1926.<ref name=USH/> In 1962, the I-75/US&nbsp;2 freeway was completed, and the former route of US&nbsp;2 through downtown along with a connection to I-75/US&nbsp;2 and the [[Sault Ste. Marie International Bridge|International Bridge]] was redesignated BS I-75.<ref name=MSHD63/><ref name=MSHD62/> In 1989, the designation was extended along Portage Avenue to the Sugar Island Ferry Dock.<ref name=MDOT89SSM>{{cite MDOT map |year = 1989 |section = C11 }}</ref><ref name=MDOT90SSM>{{cite MDOT map |year = 1990 |section = C11 }}</ref>

'''Major intersections'''<br/>
{{MIinttop|location=Sault Ste. Marie|county=Chippewa|length_ref=<ref name=PRFA/>}}
{{MIint
|mile=0.000
|type=concur
|road={{jct|state=MI|I|75|Tour|GLCT|dir1=north|location1=[[Sault Ste. Marie International Bridge|Bridge to Canada]]|city2=St. Ignace}}
|notes=Western end of LHCT concurrency; exit&nbsp;392 on I-75
}}
{{MIint
|mile=0.620
|road={{jct|state=MI|CDH|H-63|dir1=south|name1=Mackinac Trail}}
|notes=Northern terminus of H-63
}}
{{MIint
|mile=1.885
|type=concur
|road={{jct|state=MI|M|129|Tour|LHCT|dir1=south|dir2=south}}
|notes=Eastern end of LHCT concurrency; northern terminus of M-129
}}
{{MIint
|mile= 5.867
|road={{jct|extra=ferry}} [[Sugar Island (Michigan)|Sugar Island]] Ferry Dock
|notes=}}
{{jctbtm|keys=concur}}

==See also==
*{{Portal-inline|Michigan Highways}}

==References==
{{reflist}}

==External links==
{{Attached KML|display=inline,title}}
{{Div col}}
*{{osmrelation|307063|BL I-75 in Pontiac}}
*[http://www.michiganhighways.org/listings/MichHwysBus32-94.html#I-75BL-P BL I-75 in Pontiac] at Michigan Highways
*{{osmrelation|307062|BL I-75 in Bay City|link =no}}
*[http://www.michiganhighways.org/listings/MichHwysBus32-94.html#I-75BS-BC BL I-75 in Bay City] at Michigan Highways
<!--*[http://www.state-ends.com/michigan/bus75-2/ BL I-75 in Bay City] at Michigan Highway Ends-->
*{{osmrelation|307061|BL I-75 in West Branch|link =no}}
*[http://www.michiganhighways.org/listings/MichHwysBus32-94.html#I-75BL-WB BL I-75 in West Branch] at Michigan Highways
*{{osmrelation|307060|BL I-75 in Roscommon|link =no}}
*[http://www.michiganhighways.org/listings/MichHwysBus32-94.html#I-75BL-R BL I-75 in Roscommon] at Michigan Highways
*{{osmrelation|307064|BL I-75 in Grayling|link =no}}
*[http://www.michiganhighways.org/listings/MichHwysBus32-94.html#I-75BL-GR BL I-75 in Grayling] at Michigan Highways
<!--*[http://www.state-ends.com/michigan/bus75-5/ BL I-75 in Grayling] at Michigan Highway Ends-->
*[http://www.michigan.gov/mdot/0,1607,7-151-9620_11154_11188-26777--,00.html BL I-75/M-72 Au Sable River Bridge] at Michigan's Historic Bridges (MDOT)
*{{osmrelation|307065|BL I-75 in Gaylord|link =no}}
*[http://www.michiganhighways.org/listings/MichHwysBus32-94.html#I-75BL-GA BL I-75 in Gaylord] at Michigan Highways
*{{osmrelation|307066|BL I-75 in St. Ignace|link =no}}
*[http://www.michiganhighways.org/listings/MichHwysBus32-94.html#I-75BL-SI BL I-75 in St. Ignace] at Michigan Highways
<!--*[http://www.state-ends.com/michigan/bus75-7/ BL I-75 in St. Ignace] at Michigan Highway Ends-->
*{{osmrelation|307067|BS I-75 in Sault Ste. Marie|link =no}}
*[http://www.michiganhighways.org/listings/MichHwysBus32-94.html#I-75BL-SS BS I-75 in Sault Ste. Marie] at Michigan Highways
<!--*[http://www.state-ends.com/michigan/bus75-8/ BS I-75 in Sault Ste. Marie] at Michigan Highway Ends-->
*[http://www.michigan.gov/mdot/0,1607,7-151-9620_11154_11188-26685--,00.html Ashmun St. Power Canal Bridge] at Michigan's Historic Bridges (MDOT)
{{div col end}}

{{I-75 aux}}
{{good article}}

[[Category:Interstate 75|Business Michigan]]
[[Category:Interstate Highways in Michigan|75 Business]]
[[Category:Business Interstate Highways|75 Business Michigan]]
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