Michigan freeway/non-freeway speed limit increases

Speed Limit Sign 75 mph
  • Public Act 445 of 2016, tasked the Michigan Department of Transportation (MDOT) and Michigan State Police (MSP) with increasing speed limits on some state highways and freeways based on the results of engineering and safety studies that utilize the 85th-percentile speeds (the speed at or below which 85 percent of traffic is moving). The law requires that these modified speed limits be in place prior to Jan. 5, 2018.

  • Photos: MDOT Statewide Sign Shop Prepares for New Speed Limits

Corridors Identified for Increased Speed Limits

Additional Resources