The bill amends section 628 of the Michigan Vehicle Code to clarify the process for establishing speed limits on county highways. It allows the county road commission, township board, and the department of state police to unanimously determine and set reasonable maximum or minimum speed limits based on engineering and traffic investigations. The bill specifies that a public record of any traffic control order establishing a modified speed limit must be filed with the county clerk, and it defines the term "county road commission" to include various governing bodies depending on the county's structure.

Additionally, the bill outlines the procedures for township boards to petition for changes in speed limits, including the ability to do so without a speed study in certain cases. It establishes criteria for setting speed limits based on the eighty-fifth percentile speed of free-flowing traffic, while allowing for limits to be set lower under specific conditions. The bill also mandates that all posted signs conform to the Michigan manual on uniform traffic control devices and establishes penalties for violations of the speed limits set under this section.

Statutes affected:
House Introduced Bill: 257.628