report.

Johnson, Jeremy; Lee, Doh-Won; Farzaneh, Reza; Zietsman, Josias; Yu, Lei; Texas Transportation Institute

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i

report.

2012-02-01
By Johnson, Jeremy ; Lee, Doh-Won ; Farzaneh, Reza ; ...

[PDF-2.25 MB]

English

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Details:

Creators:

Johnson, Jeremy ; Lee, Doh-Won ; Farzaneh, Reza ; Zietsman, Josias ; Yu, Lei

Johnson, Jeremy ; Lee, Doh-Won ; Farzaneh, Reza ; Zietsman, Josias ; Yu, Lei Less -
Corporate Creators:

Texas Transportation Institute
Corporate Contributors:

Texas. Dept. of Transportation. Research and Technology Implementation Office ; United States. Federal Highway Administration

Texas. Dept. of Transportation. Research and Technology Implementation Office ; United States. Federal Highway Administration Less -
Subject/TRT Terms:

[+]

Diesel Engine Exhaust Gases Diesel Engines Diesel Motor Exhaust Gas--Texas Exhaust Gases Heavy Duty Vehicles Polluting Gases
Publication/ Report Number:

FHWA/TX-12/0-6237-1
Resource Type:

Tech Report
Geographical Coverage:

Texas
Edition:

Technical report; Sept. 2008¿Aug. 2011.
Corporate Publisher:

Texas Transportation Institute
Abstract:

The relative contribution of heavy-duty diesel vehicles (HDDVs) to mobile source emissions has grown

significantly over the past decade, and certain vehicles identified as high emitting vehicles (HEs) contribute

disproportionately to the overall HDDV emissions. It is critical for state and local transportation agencies in

nonattainment areas such as the Houston-Galveston-Brazoria (HGB) area to address this component of the

fleet to mitigate emissions effectively from the component.

For this study, a total of 30 HDDVs were selected from City of Houston (COH) fleet based on opacity testing

for HEs and random selection for non-HEs. With the selected 30 vehicles, driving and idling emission testing

were performed to characterize their emissions with respect to vehicle classes, types (HE or non-HE), and

model years. The measured emission testing results were analyzed and compared with Motor Vehicle

Emission Simulator (MOVES) estimates as well as among vehicle classes and types. In general, emissions of

HEs were higher than non-HEs. Replacing HEs with non-HEs or vehicles complying with new emissions

standards could reduce their emissions significantly. This report contains detailed results including gaseous,

PM, and air toxic emissions testing results and MOVES estimates.
Format:

PDF
Collection(s):

US Transportation Collection
Main Document Checksum:

[+]

urn:sha256:0af5cfa45ee80642512d219b2e8fda550a018230cdf4925154cedc5da4cd9a86
Download URL:

https://rosap.ntl.bts.gov/view/dot/23854/dot_23854_DS1.pdf
File Type:

No Additional Files

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report.

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