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HB 4597

Traffic control: speed restrictions; establishment of speed limits by local governments; allow. Amends sec. 628 of 1949 PA 300 (MCL 257.628).

2025-2026 Regular Session Introduced by Karl Bohnak and 8 co-sponsors

Grants Michigan local governments authority to independently set speed limits on roads within their jurisdictions, expanding municipal traffic control powers.

bill electronically reproduced 06/10/2025
#localgovernment:other #trafficcontrol:speedrestrictions
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Bill Summary · HB 4597

Legislative bill overview

HB 4597 amends Michigan's Vehicle Code (MCL 257.628) to grant local governments expanded authority to establish and modify speed limits within their jurisdictions. The bill specifically allows municipalities to set speed restrictions independently rather than being bound by state-level regulations, giving cities and counties greater control over traffic safety measures on local roads.

Why is this important

Speed limit authority directly affects public safety, road fatality rates, and quality of life in residential and commercial areas. Communities have varying traffic patterns, pedestrian activity, and infrastructure conditions that may warrant different speed restrictions; localized control could allow faster response to specific safety concerns, though it also creates potential inconsistency across regional transportation networks.

Potential points of contention

  • Fragmented traffic standards: Patchwork speed limits across neighboring municipalities could confuse drivers and create enforcement challenges, potentially reducing effectiveness of safety measures
  • Liability and safety equity: Wealthier communities might implement more aggressive traffic calming measures while under-resourced areas cannot, creating disparities in pedestrian protection
  • State highway coordination: Unclear how local speed limits interface with state roads and regional traffic flow, potentially creating bottlenecks or safety hazards at municipal boundaries

Compiled from official sources — confirm details with the bill’s official record.

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