Michigan 2025-2026 Regular Session

Michigan House Bill HB4344

Introduced
4/17/25  
Refer
4/17/25  
Report Pass
5/13/25  
Engrossed
5/21/25  

Caption

House Bill 4344 of 2025

Summary

HB 4344 amends Michigan’s Motor Carrier Safety Act to update the state’s adoption of federal motor carrier and hazardous materials regulations. The bill largely keeps Michigan aligned with selected Federal Motor Carrier Safety Administration rules, but clarifies how certain federal terms are to be interpreted in state law, including replacing references to federal agencies and officials with Michigan agencies and personnel for enforcement purposes. It also preserves specific treatment for agricultural product transportation and defines several terms used in the act. A central change in the bill is an exemption from federal hours-of-service limits for vehicles that are traveling to assist with, or directly assisting with, a disaster or emergency during a governor-declared state of disaster or state of emergency under Michigan’s emergency management law. The bill also continues to exclude certain public transit buses operated by local governments and transportation authorities from the act’s coverage, and it narrows application of some motor carrier safety provisions for non-commercial vehicles used in intrastate commerce while keeping them subject to other federal safety parts.

Impact

The bill would amend MCL 480.11a, the section of the Motor Carrier Safety Act that incorporates federal trucking and hazardous materials rules into Michigan law. In practical terms, it would modify how Michigan applies federal regulations to motor carriers, hazardous materials transport, and enforcement, while creating a specific emergency-response exception to hours-of-service rules. It would also maintain existing exemptions for public transit agencies and certain intrastate non-commercial vehicles, affecting carriers, transit authorities, enforcement agencies, and emergency responders.

Sentiment

The available voting history suggests strong support for the bill. It was reported from committee without amendment on a 15-0 vote and later passed the House on third reading by a wide margin, 103-2, with immediate effect. No committee transcript was provided, so there is no recorded debate in the supplied materials, but the vote pattern indicates broad bipartisan approval and limited opposition.

Contention

The main policy issue is the emergency-hours-of-service exemption, which appears designed to let vehicles respond more freely during declared disasters or emergencies. Supporters likely view this as a practical public-safety measure that helps with disaster response and recovery, while any concerns would center on whether relaxing driving-hour limits could reduce safety oversight during emergencies. Another possible point of interest is the bill’s continued carve-outs for public transit agencies and its detailed reworking of federal terminology into Michigan enforcement terms, though the recorded votes show little visible controversy.

Companion Bills

No companion bills found.

Previously Filed As

MI HB6037

House Bill 6037 of 2026

MI HB5949

House Bill 5949 of 2026

MI HB5943

House Bill 5943 of 2026

MI S3097

Requires every vehicle that operates in intrastate commerce be permanently marked with a US DOT Number effective April 1, 2027.

MI H7725

Requires every vehicle that operates in intrastate commerce be permanently marked with a US DOT Number effective April 1, 2027.

MI HB47

House Bill 47 / SL 2025-2

MI HB40

House Bill 40 / SL 2025-25

MI HB251

House Bill 251 / SL 2025-18

MI HB358

House Bill 358 / SL 2025-92 (=S51)

MI HB23

House Bill 23 / SL 2025-67

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