Emissions Reductions as a Result of Automobile Improvement

• Published in: Environmental science & technology Vol. 37; no. 22; pp. 5097 - 5101
• Main Authors: Pokharel, Sajal S, Bishop, Gary A, Stedman, Donald H, Slott, Robert
• Format: Journal Article
• Language: English
• Published: Washington, DC American Chemical Society 15.11.2003
• Subjects: Air Pollutants - analysis; Applied sciences; Atmospheric pollution; Automobiles; Automobiles - standards; Carbon Monoxide - analysis; Cities; Emissions control; Exact sciences and technology; Hydrocarbons - analysis; Nitric Oxide - analysis; Pollution; Pollution sources. Measurement results; Renovation & restoration; Transports; United States; Vehicle Emissions - analysis; Vehicle Emissions - prevention & control; United States; North America; America; USA; Nitrogen oxide; Hydrocarbon; Environmental policy; Pollution control; Motor vehicle; Pollutant emission; Remote sensing; Correlation analysis; Air pollution; Vehicle type; Exhaust gas; Pollution abatement; Road traffic; Carbon monoxide; Emission measure; Performance
• ISSN: 0013-936X; 1520-5851
• DOI: 10.1021/es026340x

Remote sensing of light duty vehicle on-road tailpipe exhaust has been used to measure on-road mass emissions of automobile fleets in Denver for 13 years and in two other U.S. cities for 5 years. Analysis of these fleets shows that newer automobiles, during a period of fairly constant new car standards, have become continually less polluting independent of measurement location. Improving emissions control technology spurred by federal regulations is thought to have brought about these trends.