Abstract
A vehicle trajectory simulation called VTS has been developed as an aid for reconstruction of automobile accidents. The two dimensional vehicle has longitudinal, lateral and yaw degrees of freedom, a point mass at the center of gravity, yaw inertia about the center of gravity and four contact points (''tires'') which can be arbitrarily positioned. When used individually or in conjunction with other computer modules, VTS provides a convenient, accurate modular tool for trajectory simulation.