On-Road Evaluation of Inspection/Maintenance Effectiveness
Publication Date
1996
Document Type
Article
Organizational Units
Chemistry and Biochemistry
Keywords
Atmospheric chemistry, Emissions, Pollutants, Inspection and Maintenance
Abstract
This study presents an evaluation of inspection and maintenance (I/M) programs in terms of their effect on motor vehicle carbon monoxide (CO) and hydrocarbon (HC) exhaust emissions as measured on-road by remote sensing technology. The results show that the performance of past I/M programs at several monitored locations has been less effective than predicted by the U.S. Environmental Protection Agency. The emissions from I/M and non-I/M vehicles measured in Tucson, AZ, and in rural Colorado show no statistically significant difference. An apparent I/M effect observed in El Paso, TX, and in Denver, CO, is smaller than predicted. Comparisons of CO emissions by vehicle age for several years at the same locations in Chicago and Denver show no evidence that the Chicago centralized I/M program was more effective than the Denver decentralized I/M program.
Publication Statement
Copyright held by the American Chemical Society.
Recommended Citation
Zhang, Y.; Stedman, D. H.; Bishop, G. A.; Beaton, S. P.; Guenther, P. L., On-road evaluation of inspection/maintenance effectiveness. Environ. Sci. Technol. 1996, 30, 1445-1450, DOI: 10.1021/Es950191j.