Nature of Modeling Boundary Pedestrian Crashes at Zones

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.

• Record URL:
  • https://doi.org/10.3141/2299-04
• Summary URL:
  • http://scholar.google.com/scholar_lookup?title=Nature+of+Modeling+Boundary+Pedestrian+Crashes+at+Zones&author=C.+Siddiqui&author=M.+Abdel-Aty&publication_year=2012
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/9780309223386
• Authors:
  • Siddiqui, Chowdhury
  • Abdel-Aty, Mohamed
• Publication Date: 2012

Language

• English

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 31–40
• Monograph Title: Pedestrians 2012
• Serial:
  • Transportation Research Record: Journal of the Transportation Research Board
  • Issue Number: 2299
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Crash analysis; Crash locations; Mathematical models; Pedestrian vehicle crashes; Traffic analysis zones
• Geographic Terms: Florida
• Subject Areas: Highways; Pedestrians and Bicyclists; Safety and Human Factors; I80: Accident Studies;

Filing Info

• Accession Number: 01366110
• Record Type: Publication
• ISBN: 9780309223386
• Report/Paper Numbers: 12-0242
• Files: TRIS, TRB, ATRI
• Created Date: Mar 27 2012 8:09AM