The Commercial Vehicle Operations (CVO) segment of the IVHS program is targeted at users of interstate trucks, local delivery vans, buses, taxis, and emergency vehicles. Specifically, the goals of the CVO program are to improve (a) the efficiency and effectiveness of traffic management and regulatory administration by government; (b) the efficiency and effectiveness of fleet management; (c) safety for operators of commercial vehicles and others affected by them; and (d) driver performance. Although a number of technologies have been developed to support these goals, the human factors aspects of these systems have not been examined.