As you can see in the "Blade" vehicle above, efficiency is improved with the wind turbine that designer Ying Hui Choo added to charge an on-board electric battery.
The 888, designed by Oskar Johansen, pivots at the center and reduces its size for "easier parking, maneuverability and increased visibility."

Emre Yazici's "EGO" has two wheels and is controlled Atari-style with a joystick. The windshield doubles as the door.