The apparatus described is computer controlled and includes a visual display system with a triple screen arrangement in front of and on the sides of a driver of a vehicle positioned on a chassis dynamometer. Three projectors project virtual scenic imagery onto the triple screen arrangement which spans at least 180° relative to the driver. The virtual scenic imagery has a progression which is dependent upon the speed of at least one of the drive wheels of the motor vehicle, as controlled by the driver, when the motor vehicle is positioned on rollers of the dynamometer. The apparatus may include a steering sensing arrangement for providing signals of steering actions by the driver, which signals are used to deflect the virtual scenic imagery in synchronism with the steering actions of the driver.