This two-volume proceedings contains 219 peer-reviewed, technical papers that explore the key policy and management issues, innovative technologies, current projects, and future prospects for traffic and transportation studies. The papers were presented at the Third International Conference on Transportation and Traffic Studies, ICTTS 2002, held at Guilin in Guangxi province, China, from July 23 to 25, 2002. The topics include: transportation policy, environment and sustainability, transportation planning and operation, traffic flow models and applications, urban traffic management and control, traffic accident and road safety, mass transit systems, applications of advanced technologies in transportation, transportation economics, physical distribution and logistics, transportation infrastructure and pavement systems, and transportation issues in developing countries.