Title

Development Of Zone System For Macro-Level Traffic Safety Analysis

Keywords

Bayesian Poisson Log-normal model; Macro-level analysis; MAUP; Regionalization; Traffic safety analysis zones; Transportation safety planning

Abstract

Various geographic units have been used in macro-level modeling. Amongst these units, traffic analysis zones (TAZs) have been broadly employed in many macroscopic safety studies. Nevertheless, no studies questioned the validity of TAZs for crash analysis at the macro-level crash modeling. In this study, we point out several possible problems of TAZs as spatial units for macroscopic safety studies. Current TAZs with homogenous crash rates were combined into new single zones. Then we created ten new zonal systems by different zone aggregation levels. The optimal zonal scale for traffic safety analysis zones (TSAZ) was determined using the Brown-Forsythe test. It was found that the zone system with about 1:2 aggregation was the optimal zone system for macroscopic safety modeling. Thus we develop what we call traffic safety analysis zones (TSAZs) that has the potential of reducing several possible problems of TAZs. Also it was shown that TSAZ based models had better fit compared to TAZ based models. © 2014 Elsevier Ltd.

Publication Date

1-1-2014

Publication Title

Journal of Transport Geography

Volume

38

Number of Pages

13-21

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/j.jtrangeo.2014.04.018

Socpus ID

84901307367 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84901307367

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