Frim
Elio Addict
I remember the Smart car being touted for this same ability, back when those where first showing up. Never once saw them park like that in the real world though.
Only in Germany did I see any parking benefit. They parked perpendicular to the curb between the curb and the sidewalk. Some people actually leased these parking spaces at apartment houses. In Korea, they use this space to plant and grow vegetables while waiting for the bus.