Once upon a time, there was a Federal Motor Vehicle Safety Standard for accelerator controls. It was a very ancient standard, written in 1972, when vehicles were equipped with purely mechanical systems. FMVSS 124 Accelerator Control Systems specified the requirements for the return of a vehicle’s throttle to the idle position when the driver removed the actuating force from the accelerator control or in the event of a severance or disconnection in the accelerator control system. Its purpose was “to reduce deaths and injuries resulting from engine overspeed caused by malfunctions in the accelerator control system.”

Decades passed, and so did the mechanical systems, into automotive history. The car makers began to seek the wise counsel of the National Highway Traffic Safety Administration: did FMVSS 124 apply to electronic systems? Yes it did, NHTSA said. Continue reading →