It can't be a city car because many U.S. cities have surface streets with speeds of 40MPH. It can't even get me to my nearby grocery store because the road the grocery store parking lot opens onto is 45MPH. Many U.S. cities were cut up between the 1950s and the 1970s to allow through traffic by relocating state route highways and interstate highways into the cities. This had the knock-on effect of raising the speed limits of surface streets that connected to or surrounded those highways. The only places you'd be able to drive this thing without being a nuisance, a traffic hazard, or a focus for police attention would be the tiny portions of the cities that existed before the 1950s and were left untouched in the decades since. That pretty much rules out the midwest, the west coast, and anything on the east coast south of Virginia.

> many U.S. cities have surface streets with speeds of 40MPH

In actual cities traffic rarely gets that fast. 20 mph is fine in the top 10 metropolitan regions if one is sticking to the core.

For what its worth, the average city speed limit in Canada is 50kmh... 40mph is 15kmh faster than that, our slowest "rural highway" or "regional road" is 80kmh (50mph).