Site Logo
x

Title:

Systemwide Intersection Safety Priority: Development and Assessment

Accession Number:

01123056

Language:

English

Source Data:

Transportation Research Board Annual Meeting 2009 Paper #09-3536

Abstract:

This paper presents the development and assessment of a systemwide intersection safety prioritization tool. Generation of a systemwide intersection crash list and ranking of intersections using a new intersection safety ranking methodology are the two main components. An automated, comprehensive and sustainable process of generating the intersection crash list was designed and it addresses issues such as crash location and distinguishing between intersection and corridor safety problems. The new ranking methodology uses a score that is a composite of crash frequency, crash severity and crash type. Sensitivity analyses indicate that the rankings generated from 1-year data are significantly different from the 5-year data with Percentage Different (PD) intersections ranging from 31 to 47 and correlation between the rankings varying from less than 0 to a maximum of 0.42. For 3-year data the PD varied from 14 to 21 and correlation ranged from 0.21 to 0.76. Therefore 1-year data should be used with great caution for prioritizing intersection safety and it is strongly recommended that a minimum of 3 year data is used. It was also found that weights used in the composite ranking were not as significant in altering the prioritization of safety as the number of years of data used. Using Median score was explored as an alternative to using total score for the intersection prioritization. It was found that although the PD was low (around 14) the correlation varied significantly from 0.73 to 0.21. Median ranking should be used with caution for generating larger lists of intersections for safety prioritization.

TRIS Files:

HRIS

Report Numbers:

09-3536

Media Type:

DVD

Pagination:

21p

Authors:

Qin, Xiao

xqin@engr.wisc.edu
University of Wisconsin, Madison

Laracuente, Luis

llaracuente@msa-ps.com
MSA Professional Services, Incorporated

Noyce, David A

noyce@engr.wisc.edu
University of Wisconsin, Madison

Chitturi, Madhav Vijaya

mchitturi@wisc.edu
University of Wisconsin, Madison

Monograph Accession #:

01120148

Publication Date:

2009

Conference:

Transportation Research Board 88th Annual Meeting

Location: Washington DC
Date: 2009/1/11 to 2009/1/15
Sponsors: Transportation Research Board

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 USA

Availability:

Find a library where document is available

Order URL: http://worldcat.org/oclc/6

Features:

Figures (7) ; References (14) ; Tables (1)

Index Terms:

Accident severity; Collisions; Evaluation and assessment; Intersections; Methodology; Ranking (Statistics); Safety; Traffic safety; Traffic signal preemption

Subject Areas:

Highways; Safety and Human Factors; I82: Accidents and Transport Infrastructure

Last Modified:

Mar 13 2009 6:36AM