Koblin says :Take a drive on "The Single Lane Superhighway". Watch the cars drive by, or draw your own and join the front of the line.
You can use either of these links to draw your own car.Additionally you can also watch the 22,000+ cars drawn by others.
This site gives really a eye feast for all the car lovers.
Plus one about this project is " You can draw your own car easily with no time and can even watch them rolling with animated wheels in the front line behind many different cars.