Macroscopic spatial analysis of pedestrian and bicycle crashes
This study investigates the effect of spatial correlation using a Bayesian spatial framework to model pedestrian and bicycle crashes in traffic analysis zones (TAZs). Aggregate models for pedestrian and bicycle crashes were estimated as a function of variables related to roadway characteristics, and various demographic and socio-economic factors. It was found that significant differences were present between the predictor sets for pedestrian and bicycle crashes. The Bayesian Poisson-lognormal model accounting for spatial correlation for pedestrian crashes in the TAZs of the study counties retained nine variables significantly different from zero at 95% Bayesian credible interval. These variables were: total roadway length with 35 mph posted speed limit, total number of intersections per TAZ, median household income, total number of dwelling units, log of population per square mile of a TAZ, percentage of households with non-retired workers but zero auto, percentage of households with non-retired workers and one auto, long term parking cost, and log of total number of employment in a TAZ. A separate distinct set of predictors were found for the bicycle crash model. In all cases the Bayesian models with spatial correlation performed better than the models that did not account for spatial correlation among TAZs. This finding implies that spatial correlation should be considered while modeling pedestrian and bicycle crashes at the aggregate or macro-level.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/00014575
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Supplemental Notes:
- Abstract reprinted with permission from Elsevier
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Authors:
- Siddiqui, Chowdhury
- Abdel-Aty, Mohamed
- Choi, Keechoo
- Publication Date: 2012-3
Language
- English
Media Info
- Media Type: Print
- Features: Figures; References; Tables;
- Pagination: pp 382-391
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Serial:
- Accident Analysis & Prevention
- Volume: 45
- Issue Number: 0
- Publisher: Elsevier
- ISSN: 0001-4575
- Serial URL: http://www.sciencedirect.com/science/journal/00014575
Subject/Index Terms
- TRT Terms: Bayes' theorem; Bicycle crashes; Crash analysis; Crash causes; Pedestrian vehicle crashes; Spatial analysis; Traffic analysis zones
- Subject Areas: Highways; Safety and Human Factors;
Filing Info
- Accession Number: 01367970
- Record Type: Publication
- Files: TRIS, ATRI
- Created Date: Apr 18 2012 9:01AM