Main Title |
On-Road Vehicle Emissions: U.S. Studies. |
Author |
Knapp, K. T. ;
|
CORP Author |
Environmental Protection Agency, Research Triangle Park, NC. Atmospheric Research and Exposure Assessment Lab. |
Publisher |
c1994 |
Year Published |
1994 |
Report Number |
EPA/600/J-94/357; |
Stock Number |
PB94-209632 |
Additional Subjects |
Air pollution sampling ;
Automobile exhaust ;
Road tests ;
Exhaust emission measurement ;
Carbon monoxide ;
Nitrogen oxides ;
Hydrocarbons ;
Dynamometers ;
Vehicle air pollution ;
Emission factors ;
Air pollution in tunnels ;
Exhaust emissions ;
Motor vehicles ;
Reprints ;
Volatile organic compounds
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
NTIS |
PB94-209632 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
9p |
Abstract |
Several recent events in mobile sources emissions measurements have caused a major reassessment of the amounts of volatile organic compounds (VOC) and carbon monoxide (CO) in the ambient air attributed to mobile sources. These include the comparison of real-world in-use vehicle emissions with those predicted by mobile emission factor models and the development of cross-road remote sensors for measuring emissions from in-use passing vehicles. The real-world measurements were generally higher than model predictions. A tunnel study in the Southern California Air Quality Study (SCAQS) found two-fold to seven-fold differences. Additional real-world studies, including the remote sensor, roadside I/M inspections and testing on the U.S. Environmental Protection Agency portable dynamometer have shown that 50% of the tailpipe emissions come from only 10% of the vehicles and 80% come from 20% of the vehicles. This paper describes the portable dynamometer study and several tunnel studies. |
Supplementary Notes |
Pub. in Science of the Total Environment 146/147, p209-215 1994. |
NTIS Title Notes |
Journal article. |
Title Annotations |
Reprint: On-Road Vehicle Emissions: U.S. Studies. |
Category Codes |
68A; 85H; 43F; 91A |
NTIS Prices |
PC A02/MF A01 |
Primary Description |
600/09 |
Document Type |
NT |
Cataloging Source |
NTIS/MT |
Control Number |
428724259 |
Origin |
NTIS |
Type |
CAT |