Assessment of advanced technologies for relieving urban traffic congestion

This report presents the results of a study to assess the application of advanced technologies in relieving urban traffic congestion. Technologies have been reviewed in the areas of traveler information systems, traffic control systems and automatic vehicle control systems. The study also includes a brief review of the application of these technologies to transit and rideshare needs. Both qualitative and quantitative assessments of a broad range of technologies were undertaken in order to select the three most promising technologies available for short-term implementation. These technologies comprise the radio data system for traffic information broadcasting, externally-linked route guidance, and adaptive traffic control. Detailed benefit-cost analyses were performed on these technologies, together with a review of the funding sources, jurisdictional and institutional issues, and consumer and user reactions to the systems. The study included a review of current moves toward a national intelligent vehicle/highway systems (IVHS) program. An outline of the projects and activities to be included in an IVHS program has been prepared, along with a preliminary time schedule. These activities have been grouped into advanced traveler information systems (ATIS), advanced traffic management systems (ATMS), fleet management and control systems (FMCS), and automatic vehicle control systems (AVCS). The report concludes by recommending the urgent need for a national program for developing, demonstrating and implementing advanced transportation technologies.