Traffic control: speed restrictions; general gravel road speed limits; modify.

Michigan House Bill 6272 amends the state vehicle code to establish a default speed limit of 55 miles per hour for county highways with gravel or unimproved surfaces. The bill allows municipalities in counties with populations of one million or more to request that this limit be lowered to 45 miles per hour on specific road segments, with the municipality covering any associated signage costs. Alternatively, if a different speed is requested, the state police must conduct a traffic study after full gravel maintenance protocols are completed to set a new limit based on free-flowing traffic data.