report.

Details

• Creators:
  Johnson, Jeremy ; Lee, Doh-Won ; Farzaneh, Reza ; Zietsman, Josias ; Yu, Lei
• Corporate Creators:
  Texas Transportation Institute
• Corporate Contributors:
  Texas. Dept. of Transportation. Research and Technology Implementation Office ; United States. Federal Highway Administration
• Subject/TRT Terms:
  • Diesel engines
  • Diesel engine exhaust gases
  • Exhaust gases
  • Polluting gases
  • Heavy duty vehicles Diesel motor exhaust gas--Texas
• 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.
  More +
• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/23854/dot_23854_DS1.pdf
• File Type:
  [PDF - 2.25 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:bd30ade00c9cca31cc561c6a3a16d383c6d3cd83677dd7ae5aed26730aed928a89b65462ff97d39310d70e5761f372757a5aba7b1142cc3b70dba8be70669f64