Record Display for the EPA National Library Catalog


Main Title On-Road Remote Sensing of CO and HC Emissions in California.
Author Stedman, D. H. ; Bishop, G. A. ; Beaton, S. P. ; Peterson, J. E. ; Guenther, P. L. ;
CORP Author Denver Univ., CO. Dept. of Chemistry.;California State Air Resources Board, Sacramento.
Publisher Feb 94
Year Published 1994
Report Number ARB-A032-093; ARB-R-94/518;
Stock Number PB94-166345
Additional Subjects Carbon monoxide ; Hydrocarbons ; Air pollution monitoring ; California ; Motor vehicles ; Remote sensing ; Infrared detectors ; Vehicle air pollution ; Automobile exhaust ; Acceleration ; Driving style effect on exhaust emissions ; Inspection ; Exhaust pipes ;
Library Call Number Additional Info Location Last
NTIS  PB94-166345 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 152p
The University of Denver used its remote sensor for motor vehicle CO and HC emissions to measure the tailpipe concentrations of over 90,000 California Vehicles in a 30-day period in 1991. The study consisted of three phases; a series of controlled tests, a pullover study of high-emitters, and a series of measurements at a variety of sites around the South Coast Air Basin and northern California. The highest CO emissions occurred under hard accelerations, while the highest HC emissions occurred during decelarations. In the pullover study, over 92% of the vehicles identified as high emitters failed the roadside inspection, equivalent to a California Smog Check. More than 60% of the vehicles stopped had defective emission control equipment (over 40% were tampered). The highest emitting vehicles showed the most variability in their emissions. This variability carries implications for the design of inspection and maintenance programs.