Handicap vans are designed specifically to allow people with physical disability to either drive the vehicles or ride on them as a passenger. A very common example is the ambulances.
Except for the front side, where the driver and another passenger can sit customarily, the back side of the ambulance has a wide space so stretchers and wheel chairs are accommodated comfortably. On each side, a long cushioned seat lines from end to end so nurses, other medical staff, and people can also sit while tending to the patient.
Most handicap accessible vans have similar features to an ambulance. They have the capacity to easily mount a wheelchair by using either a ramp or lift. This way, the wheelchair is quickly loaded into the handicap vehicle without much physical effort.
The seating feature is different as well. Generally, the seats are removed to allow a wheelchair to fit in comfortably, either at the front side at the driver