This is good motivational fodder for anyone who likes to tinker with vehicles: MIT's Vehicle Design Summit:
The Vehicle Design Summit, started at MIT, is a consortium of engineering students from around the globe that has created four diverse drivetrain vehicles already and is now aiming at creating an industry-ready electric vehicle within the next two years. The ultimate goal of the student-led consortium is to find alternative sustainable transportation technologies.
Vehicles made: pure electric, a human electric hybrid, a bio-diesel conversion, fuel cell. 3 of 4 were 3-wheel single passenger vehicles.