A simple spatial queueing model for the program TRANSYT 7 is described. In the model, vehicles queue one behind the other; at the commencement of the green phase the start wave travels along the queue discharging vehicles from the front at the saturation flow rate; vehicles arriving before the start wave reaches the back of the queue extend the queue. The results of on-street surveys of traffic queueing were used to calibrate the model. The model gave a more realistic estimate of the actual length of the queue at each step in the cycle than does TRANSYT. In order to assess the degree of queueing in a network, measures of spare road storage capacity, developed previously, were incorporated into the modified version of TRANSYT 7 as part of the performance indicator used for signal plan optimization.
Queueing Model for TRANSYT 7
1980
30 pages
Report
No indication
English
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