Framework for Evaluating Advance-Detection Designs for High-Speed Intersection Approaches

Abstract

This paper describes a framework for evaluating an advance-detection design. The framework can be used to identify the most effective configurations for a given detection design. It accounts for the detection layout, including number and position of detectors; traffic conditions, including volume and speed; and controller settings, including passage time and operation of the stop line detector after queue clearance. The framework is demonstrated by application to six advance-detection designs used in Texas. The framework is based on measures of control delay, probability of ending the green phase through max-out, and probability of providing indecision-zone protection during green-phase gap-out. The latter measure is defined as “detection coverage.” These measures are useful for quantifying the operational and safety performance of a detection design. The framework can be used (a) to select an advance-detection design for an intersection approach with a given 85th percentile traffic speed and (b) to determine the range of traffic speeds for which the detection design can provide acceptable indecision-zone coverage. This information is useful for sites where traffic speeds are not known precisely or are expected to vary over the day, week, or month. It can also be used to determine how changes in controller settings will affect the performance of the detection design.

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References

Highway Capacity Manual. Transportation Research Board, Washington, D.C., 2000.

Bonneson

J. A.

, and McCoy

P. T.

Methodology for Evaluating Traffic Detector Designs. In Transportation Research Record 1421, TRB, National Research Council, Washington, D.C., 1993, pp. 76–81.

Hulsher

F. R.

The Problem of Stopping Drivers After the Termination of the Green Signal at Traffic Lights. In Traffic Engineering and Control, Crowthorne, England, March 1984, pp. 110–116.

Sheffi

, and Mahmassani

A Model of Driver Behavior at High-Speed Signalized Intersections. Transportation Science, Vol. 15, No. 1, Feb. 1981, pp. 50–61.

, and Abbas

M. M.

Optimal Advance Detectors Design for the Multi-Detector Green Extension System at High-Speed Signalized Intersections. Presented at 88th Annual Meeting of the Transportation Research Board, Washington, D.C., 2009.

ITE Technical Council Committee 4A-16. Determining Vehicle Signal Change Intervals: Proposed Recommended Practice. ITE Journal, Vol. 59, No. 7, July 1989, pp. 27–32.

Lin

F.-B.

Optimal Timing Settings and Detector Lengths of Presence Mode Full-Actuated Control. In Transportation Research Record 1010, TRB, National Research Council, Washington, D.C., 1985, pp. 37–45.