Significant efforts are being made at present to define, evaluate, and ultimately deploy, various forms of intelligent transportation systems (ITS). These systems permit the implementation of advanced traffic control strategies through the application of advanced surveillance, control and communication systems. Traditionally, the evaluation of the performance of these communication systems and traffic networks has been performed predominantly independent of each other. This paper describes the development and application of an extension to an ITS benefits evaluation model to permit a partially coupled evaluation of the communication system loading and the ATMS/ATIS functions. This extended model is capable of estimating dynamic local and network wide communication loadings that depend on the spatial and temporal traffic demands, the network topology, the characteristics of the communication hardware and the communication system operating rules. The model is applied in this paper to a simple hypothetical network to demonstrate the potential benefits of carrying out a partially coupled evaluation of communication system loading and traffic network efficiency. A sensitivity analysis was carried out to determine the impact of the fraction of ITS equipped vehicles and the level of congestion on the level of communication loadings. It was demonstrated that, as a result of congestion and traffic diversion, antenna communication loads did not uniformly increase in direct proportion to the average number of equipped vehicles entering the network.


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    Title :

    Coupled evaluation of communication system loading and ATIS/ATMS efficiency


    Contributors:
    Hellinga, B. (author) / Rakha, H. (author) / Van Aerde, M. (author)


    Publication date :

    1995-01-01


    Size :

    687077 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



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