Interstate 375 Business (Detroit, Michigan)

Interstate 375
Walter P. Chrysler Freeway
I-375 highlighted in red
Route information
Auxiliary route of I-75
Maintained by MDOT
Length:	1.062 mi (1.709 km)
Existed:	June 12, 1964 (1964-06-12) – present
Major junctions
South end:	BS I-375 in Detroit
North end:	I-75 in Detroit
Location
Counties:	Wayne
Highway system
Interstate Highway System Main Auxiliary Suffixed Business Future Michigan State Trunkline Highway System Interstate US State Byways ← M-331 I-475 →

Interstate 375 (I-375) in Detroit, at only 1.062 miles (1.71 km) in length, once had the distinction of being the shortest signed Interstate Highway in the country. It is the southernmost leg of the Walter P. Chrysler Freeway and a spur of I-75 into downtown Detroit, ending at the unsigned Business Spur Interstate 375 (BS I-375), better known as Jefferson Avenue. The freeway opened on June 12, 1964. The Michigan Department of Transportation (MDOT) announced in 2013 that it may remove I-375 in the future.

I-375 and the Chrysler Freeway begin at Jefferson Avenue and St. Antoine Street in downtown Detroit near the Renaissance Center. They run east before turning north. Just about a mile (1.6 km) after the southern terminus, I-375 meets the Fisher Freeway which carries I-75 north of downtown. At this interchange, I-75 takes ramps to leave the Fisher Freeway and use the Chrysler Freeway, replacing I-375. I-375 is a four-lane freeway the entire length. The entire length of I-375 is included on the National Highway System, a network of roadways that are important to the country's economy, defense, and mobility.

According to the Michigan Department of Transportation (MDOT), I-375 is 1.062 miles (1.709 km). At the time it opened until at least 2007, I-375 was the shortest signed Interstate in the country. Based on FHWA data, there are three Interstates that are shorter: I-110 in Texas (0.92 mi or 1.48 km), I-878 in New York (0.70 mi or 1.13 km) and I-315 in Montana (0.83 mi or 1.34 km). The latter two designations are not signed on their respective roadways, and I-110 in Texas has since been signed.