The web Browser you are currently using is unsupported, and some features of this site may not work as intended. Please update to a modern browser such as Chrome, Firefox or Edge to experience all features Michigan.gov has to offer.
Did you know that the Michigan Department of Transportation is responsible for Michigan’s nearly 10,000-mile state highway system (M, I, and US-routes)? In fact, it is the backbone of Michigan’s 120,000-mile highway, road and street network. So, whether you are a daily commuter, business owner, or tourist exploring the state, you and millions of other road users depend on Michigan's transportation system every day.
Learn more about traveling efficiently and safely throughout Michigan.
At MDOT, safety is paramount. It is our goal to improve overall safety for all road users, internal staff, contractors performing work on roads, and emergency responders.
Our goal is to keep Michigan's motorists safe, informed, and mobile. That is why MDOT offers many ways to help ease the stress of commuting by providing information that commuters want and need as they make daily travel decisions.
In Michigan, there are three publicly-owned and operated bridges: Mackinac Bridge, Blue Water Bridge, and International Bridge. There are also two privately-owned and operated border crossings: Ambassador Bridge and Detroit-Windsor Tunnel.