01366110

Component

https://doi.org/10.3141/2299-04

http://scholar.google.com...-Aty&publication_year=2012

Traffic analysis zones are often delineated by the existing street network. This practice may result in a considerable number of crashes on or near zonal boundaries. Although the traditional macrolevel approach to crash modeling assigns zonal attributes to all crashes that occur within the zonal boundary, this paper acknowledges the inaccuracy resulting from relating crashes on or near the boundary of the zone to merely the attributes of that zone. This paper proposes a novel approach to account for the spatial influence of neighboring zones on crashes that occur specifically on or near the zonal boundaries. Predictive models for pedestrian crashes per zone were developed with a hierarchical Bayesian framework and with separate predictor sets for boundary and interior (nonboundary) crashes. The hierarchical Bayesian model that accounted for spatial autocorrelation was found to have better goodness-of-fit measures than did models that had no specific consideration for crashes located on or near the boundaries. In addition, the models were able to capture some unique predictors associated explicitly with interior and boundary-related crashes. For example, two variables, total roadway length with a posted speed of 35 mph and long-term parking cost, were not statistically significant from zero in the interior crash model but were significantly different from zero at the 95% level in the boundary crash model.

01457870

12-0242

English

pp 31–40

2012

Transportation Research Record: Journal of the Transportation Research Board

9780309223386

Print

Figures; References; Tables

Crash analysis; Crash locations; Mathematical models; Pedestrian vehicle crashes; Traffic analysis zones

Florida

Highways; Pedestrians and Bicyclists; Safety and Human Factors; I80: Accident Studies

TRIS, TRB, ATRI

Feb 8 2012 4:53PM

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• Documenting Targeted Behaviors Associated with Pedestrian Safety
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• Simple, Inexpensive Approach to Sampling for Pedestrian and Bicycle Surveys: Approach Developed in Pedestrian and Bicycling Survey
• To Go or Not To Go: Pedestrian Behavior at Intersections with Standard Pedestrian Call Buttons
• Using Free and Proprietary Data to Compare Shortest-Path Lengths for Effective Pedestrian Routing in Street Networks