The report accesses the communications capacity of the traffic management systems being installed in Texas with a view to two-way communications between the traffic management centers and vehicles on the roadway. The study will investigate the general telecommunications requirements for information flow, both from and to vehicles and traffic centers. Various approaches to the communication problem have been studied in terms of data rates and bandwidth requirements, feasibility of implementation and the ability to incorporated future expansions. These approaches include the use of infra-red optical communications in a distributed environment, convential spread spectrum radio, and the use of a dedicated frequency-band. The report only investigates those communication systems which offer the most promising methods for communicating between vehicles and a traffic management center. It does not consider, for example, the distribution using a fiber-optic network installed under major highways. The capacity requirements of such a network are not covered in the report. The emphasis is on digital systems that offer unique advantages over analog systems, including the ability to integrate with existing data networks such as the telephone network.
Communications in Intelligent Vehicle Highway Systems. Part 1
1991
110 pages
Report
Keine Angabe
Englisch
Road Transportation , Common Carrier & Satellite , Transportation & Traffic Planning , Transportation , Highway communication , Traffic management , Driver aid information and routing system , Communication systems , Traffic control devices , Frequencies , Texas , Telecommunication , Electronic route guidance system , Traffic control , Highway transportation , Fiber optics , Feasibility studies , Radio communication , Intelligent vehicle highway systems
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