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.
Strategies for Improving Traffic Operations at Oversaturated Diamond Interchanges
1992
87 pages
Report
No indication
English
Transportation & Traffic Planning , Transportation , Road Transportation , Highway Engineering , Diamond interchanges , Signalized intersections , Traffic control optimization , Traffic signal coordination , Traffic volume , Area traffic control , Traffic engineering , Traffic signal cycle length , Traffic signal timing , Texas , Simulation , Urban highways , Highway design
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