Abstract: A vehicle simulation system for evaluating occupant ergonomic considerations related to driving position, spaciousness and access includes a seating buck adapted to provide a simulated interior environment of a vehicle by providing adjustable positions for a seat, a steering wheel and pedals, and an access module adapted to moveably support the seating buck therein and to provide an adjustable seat to ground height for the seating buck, adjustable dimensions of a simulated door opening and an adjustable position of the simulated door opening relative to the seating buck.