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Title:

Pedestrian Exposure to Vehicle Emissions

Accession Number:

01043505

Record Type:

Component

Availability:

Transportation Research Board Business Office

500 Fifth Street, NW
Washington, DC 20001 United States

Abstract:

Most research on vehicle emissions in the field of transport and traffic engineering has focused on measuring or estimating average vehicle emissions with the objective of reducing total emissions from road traffic. This approach has resulted in overlooking the localized exposure effects on individuals. Signalized intersections and the traffic management policies that determine the cycle settings could potentially influence both total emissions and exposure levels, especially of pedestrians in urban areas. At a traffic signal, with pedestrian crossings, pedestrians are in the immediate vicinity of a large number of idling or accelerating vehicles. The signal timings, the geometry of the junction plan, the type of pedestrian crossings, all are policy parameters that are not specifically designed with consideration of traffic emissions. One reason is that the precise nature of how these different parameters affect vehicle emissions is not clearly known. This paper analyses pedestrian exposure to vehicle emissions and the role played by signal timings. A complex network is coded in a micro-simulation model that allows tracking of vehicle and pedestrian movements and is linked to an emissions data base. The effects of these emissions on the pedestrian paths and crossings are then estimated using an air dispersion model. The suitability of various traffic signal plans and how they impact pedestrian exposure to CO and PM emissions is discussed.

Monograph Accession #:

01042056

Report/Paper Numbers:

07-2721

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Ishaque, Mohammed M
Noland, Robert B

Pagination:

42p

Publication Date:

2007

Conference:

Transportation Research Board 86th Annual Meeting

Location: Washington DC, United States
Date: 2007-1-21 to 2007-1-25
Sponsors: Transportation Research Board

Media Type:

CD-ROM

Features:

Figures (21) ; Tables (3)

Uncontrolled Terms:

Exposure (Pollutants)

Subject Areas:

Energy; Environment; Highways; Operations and Traffic Management; Pedestrians and Bicyclists; Planning and Forecasting; I15: Environment; I72: Traffic and Transport Planning

Source Data:

Transportation Research Board Annual Meeting 2007 Paper #07-2721

Files:

TRIS, TRB

Created Date:

Feb 8 2007 7:25PM