4
Among USDOT’s first steps in creating a framework around AVs was to develop the concept of
Voluntary Safety Self-Assessments (VSSAs). VSSAs entail 12 sections—ranging from system safety
and validation methods to consumer education and government engagement—where companies
document and explain how they approach and ensure safety. The level of detail in these reports
continues to advance as companies’ technologies and safety management evolve.
In AV 3.0, USDOT expanded its guidance to incorporate CMVs. Notably, USDOT and the Federal
Motor Carrier Safety Administration (FMCSA) concluded that SAE Level 4 operation for commercial
vehicles was allowable under existing trucking regulations, noting that “FMCSA regulations will no
longer assume that the CMV driver is always a human or that a human is necessarily present
onboard a commercial vehicle during its operation.” Furthermore, FMCSA asserted preemption
authority over state or local legal requirements that interfere with the application of federal motor
carrier safety regulations, including as they pertain to automated driving system (ADS) development,
testing, and deployment in interstate commerce.
National Highway Traffic Safety Administration
NHTSA is the USDOT agency charged with developing and issuing Federal Motor Vehicle Safety
Standards (FMVSSs) aimed at increasing safety on roadways and reducing vehicular accidents. The
FMVSSs stipulate specific design, construction, performance, and durability standards for motor
vehicles and are codified in Title 49 §571 of the U.S. Code of Federal Regulations (3).
NHTSA’s authority has two main implications for AVs. First, because FMVSSs have not yet been
updated for vehicles that are designed to operate without a human driver, any AV would either have
to be compliant with all relevant existing FMVSSs required of any other vehicle or receive an
exemption if some aspect of the AV were not compliant. Depending on the intended use case of an
AV, some existing FMVSSs that are important for human-driven vehicles end up being largely
irrelevant for AVs. One example is Title 49 §571.103 of the U.S. Code of Federal Regulations, which
requires windshield defrosting and defogging systems. In the case of a fully autonomous passenger
vehicle where there is no driver, for example Waymo’s One, a passenger would not need to be able
to see the roadway, and the need would be negated. However, this equipment would still be
mandatory unless the AV developer successfully petitioned for an exemption to §571.103. Similarly,
fully autonomous delivery vehicles, such as Nuro’s R2, where only cargo is in the vehicle, would not
require traditional safety standards; Nuro was able to receive an exemption that did not require the
vehicle to have windows. However, many AV developers, especially those developing automated
commercial vehicles, are building on top of FMVSS-compliant vehicles and therefore would not need
FMVSS exemptions.
The second potential NHTSA impact on FMVSSs is that given NHTSA’s authority to regulate vehicle
equipment, NHTSA would be the lead agency to define any ADS equipment or performance
requirements. To date, NHTSA has not yet provided any regulations exclusively pertaining to AVs.
NHTSA will continue to play a vital role in the development of safety standard policy for AVs for the
foreseeable future. A 2016 enforcement guidance bulletin reiterated NHTSA’s broad enforcement
authority under existing statutes and regulations to address existing and emerging automated safety
technologies to protect the safety of the driving public against unreasonable risks of harm.