Abstract
A visual heavy-duty vehicle (HDV) classification scheme is developed for use in collecting onroad field data and for use in allocating observed vehicle volumes to applicable MOBILE6 vehicle classes. The X-scheme employs only three HDV classes based upon the number of axles and growth vehicle weight ratings, which represents a hybrid scheme between the FHWA HDV classification scheme. A hybrid HDV scheme such as the X-scheme is needed not only for easy vehicle observation, but also for highway performance monitoring systems (HPMS) database development. The emission rate differences with the EPA guidance and the X-scheme methods for four pollutants are also presented.
Original language | English |
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Pages (from-to) | 5347-5359 |
Number of pages | 13 |
Journal | Proceedings of the Air and Waste Management Association's Annual Meeting and Exhibition |
State | Published - 2004 |
Externally published | Yes |
Event | Proceedings of the A and WMA's 97th Annual Conference and Exhibition; Sustainable Development: Gearing Up for the Challenge - Indianapolis, IN, United States Duration: Jun 22 2004 → Jun 25 2004 |