information:highlighting, structural:expansion
Transit systems

Mass transit in the region is provided by bus services. The Detroit Department of Transportation provides service within city limits up to the outer edges of the city. From there, the Suburban Mobility Authority for Regional Transportation (SMART) provides service to the suburbs and the city regionally with local routes and SMART's FAST service. FAST is a new service provided by SMART which offers limited stops along major corridors throughout the Detroit metropolitan area connecting the suburbs to downtown. The new high-frequency service travels along three of Detroit's busiest corridors, Gratiot, Woodward, and Michigan, and only stops at designated FAST stops. Cross border service between the downtown areas of Windsor and Detroit is provided by Transit Windsor via the Tunnel Bus.

An elevated rail system known as the People Mover, completed in 1987, provides daily service around a 2.94-mile (4.73 km) loop downtown. The QLINE serves as a link between the People Mover and the Amtrak station via Woodward Avenue. The Ann Arbor–Detroit Regional Rail line will extend from New Center, connecting to Ann Arbor via Dearborn, Wayne, and Ypsilanti when it is opened.

The Regional Transit Authority (RTA) was established by an act of the Michigan legislature in 2012 to oversee and coordinate all existing regional mass transit operations, and to develop new transit services in the region. The RTA's first project was the introduction of RelfeX, a limited-stop, cross-county bus service connecting downtown and midtown Detroit with Oakland county via Woodward avenue.

Amtrak provides service to Detroit, operating its Wolverine service between Chicago and Pontiac. The Amtrak station is in New Center north of downtown. Intercity bus service is offered at the Detroit Bus Station. Greyhound Lines, Flixbus, Indian Trails, and Barons Bus Lines connect Detroit with numerous cities across the Midwest.