In Sullivan City, Texas, a signal control system that gives priority to trucks has reduced truck stops by 100 for a weekly volume of 2,500 trucks and has reduced truck delay.
The data was collected and analyzed to evaluate the impact of using the preemptive signal control system to minimize truck stops. The research team collected data three weeks before implementation, and then three weeks after. The "before" and "after" data were collected during typical traffic volume conditions.
The signal control system benefited about four percent of the trucks on the roadway since holds were placed only when trucks needed extended green time. For a weekly volume of 2500 trucks, 100 less stops were made.
Reducing Truck Stops at High-Speed Isolated Traffic Signals
Author: Sunkari, Srinivasa R., et al.
Published By: Texas DOT
Prepared by the Texas A&M University for the Texas DOT
Source Date: September 2000
Other Reference Number: Report No. FHWA/TX-01/1439-8
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coordinated signals, signal coordination, centralized signal control, signal synchronization, traffic signals, advanced signal control, signal timing optimization, coordinated signal control, advanced signal controller, traffic signal retiming, retiming