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DEVELOPMENT WORK FOR IMPROVED HEAVY-DUTY VEHICLE MODELING CAPABILITY DATA MINING--FHWA DATASETS
Citation:
LINDHJEM, C. J. AND S. SHEPARD. DEVELOPMENT WORK FOR IMPROVED HEAVY-DUTY VEHICLE MODELING CAPABILITY DATA MINING--FHWA DATASETS. U.S. Environmental Protection Agency, Washington, DC, EPA/600/R-07/096 (NTIS PB2008-111683), 2007.
Impact/Purpose:
Published Report
Description:
A heavy-duty vehicle can produce 10 to 100 times the emissions (of NOx and PM emissions especially) of a light-duty vehicle, so heavy-duty vehicle activity needs to be well characterized. Key uncertainties with the use of MOBILE6 regarding heavy-duty vehicle emissions include the fraction of heavy-duty vehicles on all types of roadways at all times of day. This work consists of an investigation and evaluation of available databases for the purpose of assisting in the development of improved emissions estimates of heavy-duty vehicles. The goal of the project was to produce estimates of the fraction of heavy-duty vehicles of all vehicle traffic, and weight distribution for those vehicles according to the time of day, day of week, and other temporal variables, and an investigation of regional differences.