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 Engine Exhaust Gases Diesel Engines Exhaust Gases Heavy Duty Vehicles Diesel Motor Exhaust Gas--Texas 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:sha-512:bd30ade00c9cca31cc561c6a3a16d383c6d3cd83677dd7ae5aed26730aed928a89b65462ff97d39310d70e5761f372757a5aba7b1142cc3b70dba8be70669f64
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/23854/dot_23854_DS1.pdf
• File Type:
  [PDF - 2.25 MB ]