Three vehicle safety technology rules delayed
Three recent rule delays are important to watch, since they have the potential to impact a motor carrier’s capital spending plans and technician training budgets.
The Department of Transportation’s latest regulatory agenda pushed back significant vehicle safety technology rules.
1. Automated emergency braking (AEB)
The AEB final rule was delayed from April 2024 to January 2025 and could require these systems on new medium to heavy-duty vehicles, 10,001 pounds and greater.
As proposed, new vehicles, 10,001 pounds to 26,000 pounds, will be subject four years from the final rule. Most new vehicles, 26,001 pounds or greater, will be subject within three years since they already must have electronic stability control (ESC).
The standard would set the lowest speed at which AEB will engage, and the system would activate at or above that speed. Also, inspections and maintenance of these systems will be required under 396.3.
2. Safe integration of automated driving systems (ADS)-equipped CMVs
The Safe Integration of Automated Driving Systems-Equipped Commercial Motor Vehicles was officially delayed one year from December 2023 to December 2024. The Notice of Proposed Rulemaking (NPRM) is expected to amend the rules to account for CMVs equipped with automated driving systems (autonomous vehicles (AVs) that operate without drivers in the vehicle).
The focus is on the inspection, repair, and maintenance regulations along with requiring carriers to maintain electronic stability control (ESC) systems.
3. Speed limiters
A hotly debated topic in recent years is the potential mandate for heavy-duty vehicle speed limiters. A Supplemental Notice of Proposed Rulemaking (SNPRM) was moved on FMCSA’s docket from December 2023 to May 2025. The proposal, if adopted, will require all vehicles rated or weighing 26,001 pounds or more with an electronic engine control unit (ECU) to be programmed to a speed limit determined by the rulemaking.
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