Automatic emergency braking — coming to a commercial vehicle near you
Automatic emergency braking (AEB) equipment will be mandatory on newly manufactured vehicles once a standard is in place. To that end, the Federal Motor Carrier Safety Administration (FMCSA) is working on a proposed rule that will impact the covered vehicles while in operation.
This rulemaking is being done in conjunction with the National Highway Traffic Safety Administration (NHTSA) and is the result of instructions from Congress in the Bipartisan Infrastructure Law.
NHTSA’s part
To begin the process, NHTSA must place standards for AEB systems into the Federal Motor Vehicle Safety Standards (FMVSS). The standards would be applicable to the same vehicles that are covered by FMVSS Number 136 (also known as §571.136). This includes truck tractors and buses with a gross vehicle weight rating of 26,001 pounds or more.
The law defines an AEB system as a system that calculates the closing rate between the commercial vehicle and an obstacle in its lane (normally, another vehicle) and then:
- Warns the driver of the obstacle, and
- If necessary, automatically applies the brakes to avoid a collision or reduce the effect of a collision if stopping in time is not possible.
When developing the FMVSS, NHTSA must conduct a review of existing AEB systems and address any identified deficiencies. Also, NHTSA must consult with representative drivers and consider their experiences with AEB systems, specifically with malfunctions and unwarranted activations.
If possible, the new FMVSS is to be in place within two years of the Bipartisan Infrastructure Law being signed. This means the goal for NHTSA is to have the new standard in place by November 15, 2023.
FMCSA’s part
Within one year of the Bipartisan Infrastructure Law being signed, FMCSA was to require that AEB systems that were installed in commercial vehicles under NHTSA’s standard be functioning. This means the date this rule was supposed to be enacted was November 15, 2022. However, as NHTSA has not enacted an AEB standard, there is no standard to base the rule on yet.
Moving forward
The DOT rulemaking report is showing these rulemakings moving forward shortly. When they are published read the proposals. If you feel strongly about AEB systems, comment as instructed. However, as these rules are at the proposal stage, it will be several years before they become requirements.
One point to remember is if you believe AEB systems could prevent crashes, you do not have to wait until they are required. You can have them installed in your vehicles today. They are available as factory installed systems on new vehicles and as retrofits for existing vehicles.
Key to remember: Both NHTSA and FMCSA must enact rules related to requiring AEBs, but it may be a while. However, the systems are available today if you believe they could prevent crashes within your fleet.