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Quantitying the Effects of Traffic Calming on Emissions Using on-road Measurement

Daham, B., Andrews, G.E., Li, H., Partridge, M., Bell, M.C. and Tate, J.E. (2005) Quantitying the Effects of Traffic Calming on Emissions Using on-road Measurement. In: General Emissions 2005. SAE Paper (2005-0). Society of Automotive Engineers , USA , pp. 155-164. ISBN 978-0-7680-1589-8

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The objective of this work was to determine the effect of one form of traffic calming on emissions. Traffic calming is aimed at reducing average vehicle speeds, especially in residential neighborhoods, often using physical road obstructions such as speed bumps, but it also results in a higher number of acceleration/deceleration events which in turn yield higher emissions. Testing was undertaken by driving a warmed-up Euro-1 spark ignition passenger car over a set of speed bumps on a level road, and then comparing the emissions output to a noncalmed level road negotiated smoothly at a similar average speed. For the emissions measurements, a novel method was utilized, whereby the vehicle was fitted with a portable Fourier Transform Infrared (FTIR) spectrometer, capable of measuring up to 51 different components in real-time on the road. The results showed that increases in emissions were much greater than was previously reported by other researchers using different techniques. When traffic-calmed results were compared to a smooth non-calmed road, there were substantial increases in CO2 (90%), CO (117%), NOx (195%) and THC (148%). These results form the basis for a good argument against traffic calming using speed bumps, especially for aggressive drivers. Slowing traffic down with speed restrictions enforced by speed cameras is a more environmentally friendly option.

Item Type: Book Section
Copyright, Publisher and Additional Information: © 2005 SAE International. This paper is published on this website with permission from SAE International. As a user of this website, you are permitted to view these papers on-line, download these pdf files and print one copy of these papers at no cost for your use only. The downloaded pdf files and printout of these SAE papers may not be copied, distributed or forwarded to others or for the use of others.
Keywords: emissions, traffic calming, on-road measurement,
Institution: The University of Leeds
Academic Units: The University of Leeds > Faculty of Engineering (Leeds) > School of Chemical & Process Engineering (Leeds) > Energy Research Institute (Leeds)
The University of Leeds > Faculty of Environment (Leeds) > Institute for Transport Studies (Leeds)
Depositing User: Hu Li
Date Deposited: 26 Mar 2007
Last Modified: 05 Jun 2014 07:12
Published Version: http://www.sae.org/technical/papers/2005-01-1620
Status: Published
Publisher: Society of Automotive Engineers
Refereed: Yes
URI: http://eprints.whiterose.ac.uk/id/eprint/2050

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