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Multi-Stage Pedestrian Crossings and Two-Stage Bicycle Turns: Delay Estimation and Signal Timing Techniques for Limiting Pedestrian and Bicycle Delay

DOI: 10.4236/jtts.2019.94031, PP. 489-503

Keywords: Pedestrian Delay, Traffic Signal Control, Multistage Crossings

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Abstract:

Signalized intersections sometimes involve multistage pedestrian crossings, in which pedestrians cross to one or more islands and then wait there for a signal to continue. When signals are timed without attention to pedestrian progression, pedestrian delay at multistage crossings can be very long. This paper addresses two issues. First, pedestrian delay at multistage crossings is rarely evaluated because there are no tools in the industry for that purpose except microsimulation. We present a numerical method for determining crossing delay with any number of stages and with the possibility of multiple WALK intervals per cycle. The same method can be applied to single stage crossings, to diagonal two-stage crossings where pedestrians may have path choice, and bicycle two-stage turns. This method has been implemented in a freely available online tool. Second, we describe several signal timing techniques for improving pedestrian and bicyclist progression, and thus reducing their delay, through multistage crossings. They include reservice for selected crossing phases, left turn overlaps, having pedestrian phases overlap each other, and bidirectional bicycle crossings which create path options for two-stage turns. Examples show the potential for large reductions in pedestrian delay, often with little or no increase in vehicular delay. In one example, the addition of a short pedestrian overlap phase reduced average pedestrian delay at a 3-stage crossing by 82 s while average vehicular delay increased by only 0.5 s.

References

[1]  FHWA (2009) Manual on Uniform Traffic Control Devices. Washington DC.
[2]  National Association of City Transportation Officials (2011) Urban Bikeway Design Guide. National Association of City Transportation Officials, New York.
[3]  National Research Council (2000) Highway Capacity Manual. TRB, National Research Council, Washington DC.
[4]  Pretty, R. (1979) Delay to Pedestrians and Vehicles at Signalized Intersections. ITE Journal, 49, 20-23.
[5]  Wang, X., Tian, Z.Z., Ohene, F. and Koonce, P.J.V. (2009) Pedestrian Delay Models at Signalized Intersections Considering Signal Phasing and Pedestrian Treatment Alternatives. Presented at 88th Annual Meeting of the Transportation Research Board, Washington DC.
[6]  Wang, X. and Tian, Z. (2010) Pedestrian Delay at Signalized Intersections with a Two-Stage Crossing Design. Transportation Research Record, 2173, 133-138.
https://doi.org/10.3141/2173-16
[7]  Ma, W.J., Liu, Y., Xie, H.Z. and Yang, X.G. (2011) Multiobjective Optimization of SignalTimings for Two-Stage, Midblock Pedestrian Crosswalk. Transportation Research Record, 2264, 34-43.
https://doi.org/10.3141/2264-05
[8]  Furth, P.G. (2015) Northeastern University Ped & Bike Crossing Delay Calculator.
http://www.northeastern.edu/peter.furth/delaycalculator/
[9]  Furth, P.G., Cesme, B. and Muller, T.H.J. (2009) Lost Time and Cycle Length for an Actuated Traffic Signal. Transportation Research Record, 2128, 152-160.
https://doi.org/10.3141/2128-16
[10]  Design Manual for Bicycle Traffic. CROW, Ede, Netherlands, 2007.
[11]  Santos, M.A. and Furth, P.G. (2017) Reducing Pedestrian Delay at the Landmark Center Interchange.
https://web.northeastern.edu/advancedtrafficcontrol/?p=406

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