The National Highway Traffic Safety Administration (NHTSA) and FMCSA have a joint project underway with the Virginia Tech Transportation Institute (VTTI) involving the use of Camera/Video Imaging Systems (C/VISs) in large trucks to improve visibility. In the first phase of this project, both mirror surrogates and enhancements are being studied and tested. Mirror enhancements provide the driver with images that are presently unavailable from standard mirror configurations (e.g., elimination of blind spots). Mirror surrogates provide the driver with the same or similar images that are available from standard mirror configurations. In the first part of this project, the tests are limited to conventional video systems, with cameras at appropriate locations on the exterior of the vehicle and with video monitors in the cab at locations that have been selected on the basis of human factors considerations and preliminary testing. This work defined field of view requirements and performance specifications for indirect viewing systems. The second phase of this project was directed at enhancing C/VISs for night and poor visibility conditions, which was tested and evaluated in a controlled setting (i.e., Smart Road). The current third phase of the project is a field demonstration of an advanced C/VIS using commercial vehicle fleets. The goal is to assess the safety and driver performance benefits of enhancing the west coast style mirror system with advanced indirect viewing technologies.