Abstract
Computer program track has been developed to simulate multiple manoeuvres at walking speed by rigid and articulated goods vehicles so that the space required for such manoeuvres can be determined. Its accuracy depends mainly on the precision with which the necessary physical quantities can be prescribed, including, usually, the minimum turning radius under the relevant conditions. Track is also sufficiently accurate for the study of vehicle paths in highway situations where speeds are higher than walking pace but still relatively low. Its application to the design of a small roundabout is described. It has also been used extensively in examining standard layouts for priority junctions. (Author/publisher)