Diesel Truck Idling Emissions: Measurements at PM2.5 Hot Spot
The University of Tennessee and Oak Ridge National Laboratory conducted a 5-month-long air monitoring study at the Watt Road interchange on I-40 in Knoxville, Tennessee, where 20,000 heavy-duty trucks travel the Interstate each day. In addition, three large truck stops are situated at this interchange, where as many as 400 trucks idle engines at night. As a result, high levels of PM2.5 have been measured near the interchange, often exceeding National Ambient Air Quality Standards. This paper presents the results of the air monitoring study, illustrating average hourly patterns of PM2.5 resulting from diesel truck emissions on the Interstate and at the truck stops. Most of the PM2.5 concentrations detected occurred during the night, when the largest contribution of emissions was from idling trucks rather than trucks on the Interstate. A nearby background air monitoring site was used to identify the contribution of regional PM2.5 emissions, which were also a significant factor in the concentrations measured at the site. The relative contributions of regional background, local truck idling, and trucks on the Interstate to local PM2.5 concentrations are presented and discussed in the paper. The results indicate the potential significance of diesel truck idling emissions to the occurrence of hot spots of high PM2.5 concentrations near large truck stops, ports, or border crossings. The significance of truck idling emissions is similar to the findings of other studies.
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- Summary URL:
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Availability:
- Find a library where document is available. Order URL: http://www.trb.org/Main/Public/Blurbs/159561.aspx
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Authors:
- Miller, Terry L
- Fu, Joshua S
- Hromis, Boris
- Storey, John M E
- Parks II, James Edgar
- Publication Date: 2007
Language
- English
Media Info
- Media Type: Print
- Features: Figures; References; Tables;
- Pagination: pp 49-56
- Monograph Title: Environmental Issues 2007
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Serial:
- Transportation Research Record: Journal of the Transportation Research Board
- Issue Number: 2011
- Publisher: Transportation Research Board
- ISSN: 0361-1981
Subject/Index Terms
- TRT Terms: Air pollution; Air quality management; Diesel engine exhaust gases; Diesel engines; Diesel trucks; Engine idling; Exhaust gases; Heavy duty trucks; Interchanges; Measurement; Particulates; Truck stops
- Uncontrolled Terms: Hot spot identification
- Geographic Terms: Knoxville (Tennessee)
- Subject Areas: Energy; Environment; Highways; Terminals and Facilities; I15: Environment;
Filing Info
- Accession Number: 01043503
- Record Type: Publication
- ISBN: 9780309104371
- Files: TRIS, TRB
- Created Date: Mar 6 2007 2:38PM