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Title:

A Priori Assessment of Safety Impacts of Traffic Management Operations: Level of Service–Based Approach

Accession Number:

01336922

Record Type:

Component

Availability:

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Washington, DC 20001 United States
Order URL: http://www.trb.org/Main/Blurbs/Highway...ent_Safety_Workforce_Develop_165860.aspx

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Order URL: http://worldcat.org/isbn/9780309167277

Abstract:

The number of accidents that occur on a road is often linked to traffic flow, whereas the severity is related to mean speed. The method developed in this paper links the level of service—described by both traffic mean flow and speed—to the number of accidents observed on a road section. The objective is to use this relationship in a priori assessment of traffic management strategies by using traffic simulation tools. Flows and speeds represent the main outputs of such models and are assumed to be influenced by other parameters such as road geometry, lighting, and weather conditions. Four levels of service are considered according to the classification used in several European countries. The levels define traffic conditions from free flow to congestion. The study uses accident and traffic data collected for a 9-year period on a 17-km stretch of the A1 motorway in the Paris region. An accident rate is computed for each level of service. The results confirm the existence of a relationship between accident rates and levels of service, with more accidents observed during congestion. An application example of a real case study illustrates the use of the proposed method for a priori assessment of traffic management strategies.

Monograph Accession #:

01350336

Report/Paper Numbers:

11-0260

Language:

English

Authors:

Princeton, Judith F
Cohen, Simon

Pagination:

pp 13-19

Publication Date:

2011

Serial:

Transportation Research Record: Journal of the Transportation Research Board

Issue Number: 2213
Publisher: Transportation Research Board
ISSN: 0361-1981

ISBN:

9780309167277

Media Type:

Print

Features:

Figures (2) ; References (18) ; Tables (4)

Uncontrolled Terms:

Mean speed; Traffic conditions

Geographic Terms:

Paris (France)

Subject Areas:

Highways; Operations and Traffic Management; Safety and Human Factors; I73: Traffic Control; I80: Accident Studies

Files:

TRIS, TRB, ATRI

Created Date:

Feb 17 2011 5:22PM

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