As the designated Metropolitan Planning Organization (MPO) for Southeast Michigan, SEMCOG coordinates transportation planning in the seven-county region which includes Livingston, Oakland, Macomb, Monroe, St. Clair, Washtenaw, and Wayne counties. SEMCOG is responsible for developing the long-range Regional Transportation Plan (RTP), which serves as the guiding framework for developing and managing the regional multimodal transportation system. Projects identified in the RTP are implemented through the Transportation Improvement Program (TIP), which allocates federal funding to high-priority projects scheduled for construction within the first four years of the RTP. All TIP projects must support and advance the goals and policies adopted by the RTP.

An aerial photograph shows a wide multi‑lane freeway with heavy traffic in both directions, surrounded by grassy embankments and adjacent surface streets. Several overpasses cross above the highway, carrying additional vehicle traffic through a dense transportation network. Parking lots, commercial buildings, and clusters of trees border the roadway, and the horizon reveals a sprawling urban landscape under clear daylight conditions.

Regional Plans and Programs

SEMCOG develops and implements transportation plans, programs, and data resources to support local governments and transportation agencies to improve the regional transportation system for safer, more efficient, and accessible travel.

Regional Plans

Regional Transportation Programs

Transportation and Mobility Planning Areas

Transportation Data, Maps, and Tools

Explore transportation data, interactive maps, and tools that help communities better understand transportation conditions and trends across Southeast Michigan. These resources support a wide range of planning needs including safety planning, infrastructure condition, multimodal planning, traffic operations, and community insights. Users can apply these resources to prioritize projects, and support data-driven decision-making.

Transportation Funding

Transportation is vital to every aspect of our lives. Highways, transit systems, recreational trails, railroads, and other modes of transportation serve to knit our region together and connect us with the nation and the world. Operating and maintaining a first-class transportation system requires reliable financial investment and resources. SEMCOG plays a role in various aspects of transportation funding, including financial forecasting, researching innovative ways to pay for needed improvements, and ensuring that adequate funding is available for proposed projects.

key resources & reports

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View ADA Transition Plan View Flooding and Stormwater Infrastructure View Federal Aid Roads View Road Funding Summary View SEMCOG TAP FAQ View 23-26 TIP Amendment View FY 23-26 TIP Project List

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