Eastpointe (also referred to as East Detroit by some) is a city in Macomb County of the U.S. state of Michigan. Eastpointe is considered a bedroom community of the Metro Detroit area.

M-3 is a north-south state highway in the U.S. state of Michigan in the Detroit metropolitan area. For most of its length, M-3 is known as Gratiot Avenue.

Gratiot is one of five major avenues (along with Woodward, Michigan, Grand River, and Jefferson) planned by judge Augustus Woodward in 1805 that extend from downtown Detroit in differing directions. Gratiot runs northeast from downtown and extends into Macomb County.

Before 2001, the southern terminus of M-3 was at exit 47A (Clark Avenue) of I-75 in the southwest side of Detroit, linking to the Ambassador Bridge, providing an international connection to Ontario's King's Highway 3. Due to exchanges between the Michigan Department of Transportation and the city of Detroit, M-3 was broken into discontinuous segments, and the former Fort Street portion of M-3 was transferred to an extended M-85. Now M-3 extends from Gratiot Avene to Randolph Street south to end at the intersection with Jefferson Avenue in downtown Detroit. The northern terminus is at exit 243 of Interstate 94 in Chesterfield Township about two miles (3.2 km) west of New Baltimore. (M-29 connects to the junction from the east.)

The total length of the route is approximately 29 miles (46 km).

The road passes through Detroit, Eastpointe, Roseville, Clinton Township, Mount Clemens, and Chesterfield Township. For much of the way it runs more or less parallel with M-97 to the north and with Interstate 94 to the south.