“…Roadway safety is a multidisciplinary science involving several elements: (a) the components of the roadway system -people, vehicles, and the roadways themselves, (b) the agencies and groups that plan, design, build, and use roads and promote roadway safety, and (c) the public health and safety communities that are concerned with injury prevention, response, treatment, and rehabilitation (Chobya et al 1999). While vehicle characteristics can contribute to traffic accidents (e.g., the lack of regular maintenance or vehicle overloading) human error is the most frequently cited factor contributing to both fatal and non-fatal injuries in motor vehicle accidents.…”