I may be purchasing a new vehicle soon (still doing the whole cost-reward calculations). When looking for a new vehicle fuel efficiency was important to me, both for savings considering how much I drive and to help the environment.
I have seen vehicles that are designed to be significantly more efficient, hybrids & electrics, but also very tiny cars, that fit less then your usual compact car, either one or two seater usually. But I can't find more information about them, or anyone who sells them. When I look around at online vehicle websites these vehicles don't appear to be listed. The most fuel efficient ones I see are generally 40-42 MPG sedans. The Mitsubishi Mirage gets 44 MPG on highway, for example.
The only tiny cars I've found were electric, but since I may need to do 3 hour drives one way I don't think electric is an option for me.
I'm mildly curious what their footprint is. Are they not mass produced and thus more expensive than their size would imply? Does the lack of mass production affect the environmental cost of manufacture? What other considerations are there?