Bill > HB4137

This bill modifies the Michigan Vehicle Code's provisions regarding speed limit determination and establishment, primarily focusing on how local and state authorities can set speed limits on various types of highways. The bill introduces more flexibility in speed limit setting by allowing speed limits to be set up to 5 miles per hour below the eighty-fifth percentile speed (the speed at which 85% of drivers are traveling) without requiring a comprehensive engineering and safety study. For speed limits lower than 5 miles per hour below the eighty-fifth percentile, authorities must conduct an engineering and safety study demonstrating specific public safety hazards, while ensuring the speed limit does not drop below the fiftieth percentile speed. The bill allows township boards to petition county road commissions for speed limit changes, mandates that speed limit signs conform to the Michigan Manual on Uniform Traffic Control Devices, and requires that traffic control orders establishing modified speed limits be filed with the appropriate local government office. Additionally, the bill provides definitions for terms like "design speed" and "local road authority" and specifies that violations of these speed limits are civil infractions. These changes aim to provide more local control and flexibility in setting speed limits while maintaining a data-driven approach to traffic safety.

Transportation and Infrastructure

https://legislature.mi.gov/Bills/Bill?ObjectName=2025-HB-4137