01099143

Component

https://doi.org/10.3141/2071-15

http://scholar.google.com...+Liu&publication_year=2008

For an actuated signalized intersection, pedestrian calls are likely to affect the effective greens serving the vehicle movements, which affect the capacity and delay of the intersection. However, the current procedure in the "Highway Capacity Manual" 2000 (HCM) for analyzing actuated signalized intersections treats pedestrian crossing and timing statically, with either pedestrian calls at all signal cycles or no pedestrians at all. In reality, pedestrian arrivals are random events with some cycles having more pedestrians than others and other cycles having no pedestrian call at all. This paper demonstrates that the current procedure can lead to erroneous results in capacity and delay estimations. A model is introduced to overcome the shortcomings in the current procedure. The model takes into account the stochastic nature of pedestrian crossings and their effects. The model computes the probability of having pedestrian calls in a cycle and the corresponding capacities and delays for traffic movements. An implementation framework was developed to help practitioners conduct capacity analyses using the model. The model’s results on a semiactuated signal-controlled intersection were comparable with the results from the SimTraffic microsimulation model. The effects of pedestrians on intersection capacity and delay were analyzed using the proposed model. Depending on the pedestrian volume and traffic conditions, the current HCM procedure could produce significant error, especially when the pedestrian volume is low, because it does not consider the stochastic nature of pedestrian arrivals.

01118256

English

pp 125-130

2008

Transportation Research Record: Journal of the Transportation Research Board

9780309113465

Print

Figures (6) ; References (10)

Highway capacity; Pedestrians; Semi traffic actuated controllers; Signalized intersections; Stochastic processes; Traffic actuated controllers; Traffic delays; Traffic models

Highway Capacity Manual 2000

Pedestrian volume

Highways; Operations and Traffic Management; I73: Traffic Control

TRIS, TRB, ATRI

Jan 29 2008 3:48PM

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