The idea of adding noise-makers to vehicles that are "too quiet" didn't exist until the first hybrid-electric cars hit the market in 2000. Within a few years, however, organizations representing the blind began to raise alarms that cars operating at low speeds solely on electric power couldn't be heard by pedestrians who also couldn't see them... NHTSA finalizes quiet-car rule for hybrids, electrics, to take full effect in 2020
The idea of adding noise-makers to vehicles that are "too quiet" didn't exist until the first hybrid-electric cars hit the market in 2000. Within a few years, however, organizations representing the blind began to raise alarms that cars operating at low speeds solely on electric power couldn't be heard by pedestrians who also couldn't see them...