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Title: Measuring Signalized Intersection Performance in Real Time with Traffic Sensors
Accession Number: 01126664
Record Type: Component
Availability: Transportation Research Board Business Office 500 Fifth Street, NW Abstract: Quality and safety of travel on arterial networks tie closely to the performance of signalized intersections. Measures commonly used for intersection performance evaluations are control delay, queue length, and cycle failure. However, these variables are not directly available from typical configurations of traffic sensors designed for intersection signal control. Collecting vehicle control delay data manually for intersection performance measurement has been a too time-consuming and labor intensive task to be practical. Video Image Processors (VIPs) have been increasingly deployed for intersection signal control in recent years. This study aims to use the extra detection capabilities of VIP for performance monitoring at signalized intersections. A VIP can support up to 24 virtual loops, but normally less than half of the virtual loops are used. By properly configuring the spare virtual loops and analyzing the loop measurements, intersection performance can be monitored in real time. In this research, we propose an approach for measuring queue length and vehicle control delay at signalized intersections based on traffic count data collected with traffic sensors. This algorithm has been implemented in a computerized system called In-PerforM. The In-PerforM system was evaluated by both field tests and simulation experiments. Although the VIP's counting errors do affect the accuracy of field test results, we still received encouraging results on queue lengths and control delay measurements in both the field tests and simulation experiments. This demonstrates that the In-PerforM system has the potential to be a cost-effective tool for performance measurement at signalized intersections.
Monograph Title: Monograph Accession #: 01120148
Report/Paper Numbers: 09-3119
Language: English
Corporate Authors: Transportation Research Board 500 Fifth Street, NW Authors: Pagination: 18p
Publication Date: 2009
Conference:
Transportation Research Board 88th Annual Meeting
Location:
Washington DC, United States Media Type: DVD
Features: Figures; Photos; References
(21)
; Tables
(2)
TRT Terms: Uncontrolled Terms: Subject Areas: Highways; Operations and Traffic Management; I73: Traffic Control
Source Data: Transportation Research Board Annual Meeting 2009 Paper #09-3119
Files: TRIS, TRB
Created Date: Jan 30 2009 7:30PM
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0000-0002-4180-5628