I attempted such in New York State. I tried to register it as a homemade vehicle. The DMV HQ told me the car was to small. I did research and called back and told them the legends car was 17 inches longer than a smart car and 1/2 inch narrower. They told me that the smart car was crash tested and my legends car was not. They told me that if I wanted to spend $400,000 and have it crash tested and it passed they would do it. They also stated that if my car had 3 wheels, it could easily be registered as a trike.