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Road signs

US-23 sign in northern lower Michigan.
Department of Transportation

Road signs

Road signs are an important part of traffic safety. They provide important information to road users, create order on the roads, and they keep people safe. More than 1,090 people die in Michigan traffic-related crashes every year. Effective and safe road signs can save lives, prevent injuries and property damage, and can improve traffic flow.

Keeping a focus on safety, MDOT routinely replaces traffic signs on highway corridors as part of a 100 percent federally funded statewide sign replacement program. Supports for traffic signs, frequently placed close to the roadway, can become deadly hazards when struck by a vehicle if not designed, manufactured, and constructed to break away upon impact. That is why when MDOT replaces old traffic signs, crews also replace sign posts to ensure safety. Coordinating the replacement of sign posts with traffic sign replacement also minimizes costs.

Learn more below about MDOT sign safety and enhancements.

A Tourist Oriented Directional Sign along M-45 west of Allendale.

Advertising signs

Businesses serving travelers and tourists can have signs placed along state trunklines.

A memorial sign showing the designation of the Aretha L. Franklin Memorial Highway.

Memorial Highway signs

Memorial Highway signs are dedicated to individuals or groups through state statute.

Political voting sign graphic.

Political signs

Rules for placement of political signs on state roads (I, M and US routes).

A Lapeer County sign that shows Clearview font.

Wrong-way warning system

A wrong-way warning system is designed to alert motorists that are driving the wrong way on freeways. Cameras detect when a vehicle is approaching; when that happens, high-intensity red LED flashing lights mounted on each of the wrong way signs are activated. This system is designed to prevent one of the most serious types of traffic crashes.

Five clues that you may be driving the wrong way
Fluorescent yellow sheeting on a Bridge Ices Before Road sign.
Reflective post sheeting on a stop sign.
Highly reflective directional sign.