M-13 Connector is a state trunkline highway

Michigan Highway System

The Michigan State Trunkline Highway System is made up of all the highways designated as Interstates, U.S. Highways and State Highways in the US state of Michigan. The system is maintained by the Michigan Department of Transportation and comprises of trunklines in all 83 counties of Michigan on...

 running 2.41 miles (3.88 km) connecting Interstate 75

Interstate 75 in Michigan

Interstate 75 is a part of the Interstate Highway System and runs from Miami, Florida to Sault Ste. Marie in the Upper Peninsula of Michigan. I-75 enters the state from Ohio in the south, just to the north of Toledo. It runs generally north through Detroit, Pontiac and Bay City, crossing the...

/US Highway 23

U.S. Route 23 in Michigan

US Highway 23 is a United States Numbered Highway that runs from Jacksonville, Florida to Mackinaw City, Michigan. In the US state of Michigan, it is a major north–south state trunkline highway that runs through the Lower Peninsula...

 (I-75/US 23) to M-13 near the community of Kawkawlin

Kawkawlin Township, Michigan

Kawkawlin Township is a civil township of Bay County in the U.S. state of Michigan. The township's population was 5,104 as of the 2000 census and is included in the Bay City Metropolitan Statistical Area...

, just north of Bay City

Bay City, Michigan

Bay City is a city in the U.S. state of Michigan located near the base of the Saginaw Bay on Lake Huron. As of the 2010 census, the city's population was 34,932, and is the principal city of the Bay City Metropolitan Statistical Area, which is included in the Saginaw-Bay City-Saginaw Township North...

. The Michigan Department of Transportation

Michigan Department of Transportation

The Michigan Department of Transportation is a constitutional government agency in the US state of Michigan. The primary purpose of MDOT is to maintain the Michigan State Trunkline Highway System which includes all Interstate, US and state highways in Michigan with the exception of the Mackinac...

 (MDOT) internally calls the road Connector 13. The speed limit is posted at 70 miles per hour (31.3 m/s) in both directions.

Route description

CONN M-13 starts at exit 164 along I-75/US 23 north of Bay City. At the interchange that marks its southern terminus, the connector route continues to the north while the main I-75 freeway turns northwesterly. About three-quarters of a mile (1.2 km) north, there is an interchange for Wilder Road. Traffic running southbound on the connector that wishes to continue northbound on I-75/US 23 has to use Wilder Road to connect to the latter freeway. The connector route is bordered by fields and residential subdivisions as it continues north to the community of Kawkawlin. The freeway ends at and at-grade intersection

Grade separation

Grade separation is the method of aligning a junction of two or more transport axes at different heights so that they will not disrupt the traffic flow on other transit routes when they cross each other. The composition of such transport axes does not have to be uniform; it can consist of a...

 with M-13.

History

This short freeway was opened in late 1960 or early 1961 as the north end of a new US 23 freeway around Bay City. The freeway was extended farther north to the Standish area in 1967; M-13 was extended north to replace the US 23 designation along the latter's former routing through Pinconning

Pinconning, Michigan

Pinconning is a city in Bay County in the U.S. state of Michigan. The population was 1,386 at the 2000 census. It is included in the Bay City, Michigan Metropolitan Statistical Area....

. At that time, the freeway stub north of Bay City became CONN M-13.

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