Observations and Model Simulations of Carbon Monoxide Emission Factors from a California Highway
- 1 January 2001
- journal article
- research article
- Published by Taylor & Francis in Journal of the Air & Waste Management Association
- Vol. 51 (1) , 121-132
- https://doi.org/10.1080/10473289.2001.10464248
Abstract
A series of twelve intensively monitored 1-hr CO dispersion studies were conducted near Davis, CA, in winter 1996. The experimental equipment included twelve CO sampling ports at elevations up to 50 m, three sonic anemometers, a tethersonde station, aircraft measurements of wind and temperature profile aloft, and a variety of conventional meteorological equipment. The study was designed to explore the role of vehicular exhaust buoyancy during worst-case meteorological conditions, such as low winds oriented in near-parallel alignment with the road during a surface-based nocturnal inversion. From the study, field estimates of the CO emission factor (EF) from a California vehicle fleet were computed using two different methods. The analysis suggests that the CT-EMFAC/ EMFAC (EMission FACtor) models currently used to conduct federal conformity modeling significantly overpredict CO emissions for high-speed, free-flowing traffic on California highways.Keywords
This publication has 2 references indexed in Scilit:
- Changing Speed-VMT Distributions: The Effects on Emissions Inventories and ConformityJournal of the Air & Waste Management Association, 2000
- Forecasting carbon monoxide concentrations near a sheltered intersection using video traffic surveillance and neural networksTransportation Research Part D: Transport and Environment, 1996