Ramp
Ramp based modifications most commonly performed on minivans. In order to provide usable headroom, the floor on the vehicle is lowered.
Folding Ramps (Both motorized and manual)
Sliding Ramps hidden in floor
Platform Lifts
Full size vans require that lifts in the form of a platform that can be raised and lowered from inside the vehicle down to the ground outside.
Other Types
Crane type lifts are combined with seats that turn and lower to the ground as a means of providing wheelchair access to some types of vehicles.