This is the fourth and final report conducted within research project 1148 entitled 'Guidelines for Operational Control of Diamond Interchanges' conducted by Texas Transportation Institute for Texas Department of Transportation within its HR&P research program. The final report (1148-4F) contains recommended strategies for improving traffic operations at signalized diamond interchanges that are becoming oversaturated (i.e., have demand volumes exceeding phase capacity) for periods of time during the peak rush hours of the day. The problem is expected to grow worse with time as traffic was found to increase at about 3.2 percent per year in the six largest Texas cities. Enhanced features for third-generation traffic control are also recommended for consideration in future specification updates of diamond controllers. Traffic signal manufacturers may also wish to examine these new features as the operational need for them is rising. In addition, enhanced traffic detector strategies are also provided to identify the presence of queue backups onto the freeway drive oversaturated conditions.


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    Title :

    Strategies for Improving Traffic Operations at Oversaturated Diamond Interchanges


    Contributors:

    Publication date :

    1992


    Size :

    87 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




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