I drive a Leaf and a Volt, both technically electric cars. The sprinting power of an electric is pretty good, I often take modded civics off the line (stoplight) in the Leaf; the point being that electric cars can quickly move to a spot you don't anticipate them. The Volt has a 'pedestrian warning horn' that, when engaged by the driver, gently and rapidly beeps the horn to draw attention to the Volt. Since it is enga…
I'm torn with the noise situation with EVs. On one hand, I obviously recognize the importance of pedestrians being made aware of nearby automobiles, especially those with vision impairment. But on the other hand, I feel that automobiles making constant loud noise is an antipattern. The reason that cars have always made constant loud noise isn't to notify pedestrians—it's because gasoline engines produce a lot of wast…
However, I would also suggest that it is a very strange, unearthly, or extrordinary phenomenon to have such a massive and fast-moving thing traversing in such silence.
For example, there are not elephants that travel so silently that they may accidentally trample rodents underfoot.
Alternatively, though, outerspace and underwater, things are much less certain regarding the danger of large masses moving quickly.