A simulator is described that can be used to investigate a variety of perceptual factors concerned with driving. It employs a back projection system for presenting a driver's eye view film, in color, to subjects sitting in a modified car body. The impression of being in a real moving car is increased by providing suitable auditory and vibratory inputs. Studies designed to validate the use of the simulator as an acceptable research tool are described. Possible improvements are discussed and a variety of potential uses of the simulator, as a research tool, are given.