Abstract
The use of real-time driving simulators for research and training of vehicle operators has increased significantly in recent years. There is a wide range of complexity among simulators currently being used around the world. An important issue to consider when implementing any simulator is validity. This paper presents different interpretations of validity in the context of simulators and vehicle simulation models found in the literature. Examples of different approaches to validating simulators and vehicle simulation models from studies found in the literature are presented. (Author/publisher)