Bay City
| Business Spur Interstate 75 | |
|---|---|
| Location: | Bay City, Michigan |
| Existed: | December 4, 1961–present |
Interstate 75 Business Spur, or BS I-75 is a spur route running through Bay City, Michigan, USA. It follows a portion of the current routing of M-25 through town. It was formerly a full loop, following what is now M-84 back to end at I-75/US 23, exit 160 south of downtown. No signs along I-75/US 23 reference the existence of BS I-75, only M-25.
A new freeway section of I-75/US 10/US 23 opened on January 3, 1961 between Saginaw and Kawkawlin. US 23 was moved out of Bay City to the new freeway. M-13 is routed along the former US 23 in Bay City. M-47 is rerouted to end in Midland, Michigan, replaced by a new BL I-75 north from the freeway into town and M-84 south of the freeway to Saginaw. BL I-75 continued with M-13 to replace the former BUS US 23 into downtown. Along the way, BL I-75 joined M-25 connecting back to I-75/US 10/US 23.
The BL I-75 designation would last until 1971. The southern half of BL I-75 is removed, converting the "business loop" into a "business spur". the new BS I-75 would then run along the section concurrent with M-25 only. The southern portion of the loop is given to M-84 as an extension of that route.
The only change since the 1971 truncation would lie at the western terminus. The interchange at exit 162 marked the location where US 10 would merge into I-75/US 23 and turn south to Detroit. M-25 also terminated at this interchange with BS I-75 coming in from the east. In 1986, US 10 would be shortened to end at this interchange, eliminating the I-75/US 10/US 23 concurrency.
Read more about this topic: Business Routes Of Interstate 75 In Michigan
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