These I'm not sure, but overall yes they can be street legal: The Renault Twizy -- I've seen them in France and in Cambridge, MA (https://www.bonzer.rocks/) They're in use and cost ~10k. Last time I checked you can get a 25mpg and a 50mpg version. While the 25mpg versions are street legal and available now in the US market, I believe the 50mpg version is still only available in europe.
https://www.renault.fr/vehicules/vehicules-electriques/twizy...