Freezing and thawing cycles lead to potholes in the spring. In addition to a toll-free pothole line, the Michigan Department of Transportation (MDOT) has posted a form on their website to encourage motorists to report potholes on state roads.
Reports of potholes on state roads (M, I and U.S. roads only) will be routed to the nearest MDOT Transportation Service Center (TSC).
To report a pothole, call 888-296-4546, around-the-clock, seven days a week, or use the "Report Potholes" link on the MDOT Website.