> but not necessarily at city speeds as the speed is low No, but often enough for it to be a factor. As a pedestrian I don't assume I can hear an engine. > (a

> but not necessarily at city speeds as the speed is low No, but often enough for it to be a factor. As a pedestrian I don't assume I can hear an engine. > (and a stationary car makes no tyre noise but combustion engine still makes some engine noise) Unless you have a start-and-stop, and it's approaching insanity to require that stopped petrol cars have speakers that make engine noise if they turn off the engine.