Airbag sensors, cabin structural integrity, and seatbelt pre-tensioners satisfy standard passenger compartment deceleration criteria.
NHTSA Regulatory Investigation Context
Tesla's commercial deployment of a purpose-built Cybercab without traditional steering wheel and driver pedals triggers direct NHTSA enforcement under 49 U.S.C. Chapter 301. Without conventional controls, automated driving systems (ADS) cannot be sold or operated in standard commercial volumes without explicit federal exemption approval.
● The Mechanical Override Dilemma
Traditional FMVSS regulations were established under the assumption of a licensed human driver capable of exerting direct torque onto a steering column or mechanical pressure to a hydraulic brake master cylinder. With full drive-by-wire and zero cabin controls, passenger intervention is physically impossible.
● Teleoperation Latency Bounds
When autonomous perception encounters occlusions or blinding weather, remote human-in-the-loop operators must step in. However, cellular latency spikes (>300ms) mean remote steering commands cannot reliably execute real-time collision avoidance at speeds exceeding 40 mph.
● The Statutory 2,500 Vehicle Cap
Under current law (49 CFR Part 555), exemptions for vehicles lacking standard controls are legally limited to 2,500 units per manufacturer per year for up to two years. Mass-market robotaxi fleets cannot legally scale without congressional legislation raising this threshold.