The requirements for vehicles go up with each weight category. Take the sofa as an example; it's registered as a motorcycle with sidecar. If it was a car instea

The requirements for vehicles go up with each weight category. Take the sofa as an example; it's registered as a motorcycle with sidecar. If it was a car instead of a 'motorcycle', it would need to meet additional requirements starting with a windshield. Heavy vehicles are strictest.