Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Economic Effectiveness of Mandatory Engine Maintenance for Reducing Vehicle Exhaust Emissions.
CORP Author TRW Systems, Redondo Beach, Calif.
Year Published 1972
Report Number CPA-22-69-087; APRAC-CAPE-13-68; 1072;
Stock Number PB-209 258
Additional Subjects ( Automobiles ; Inspection) ; ( Air pollution ; Exhaust gases) ; ( Automobile engines ; Exhaust gases) ; Feasibility studies ; Maintenance ; Economic analysis ; Cost estimates ; Mathematical models ; Gas sampling ; Optimization ; Carbon monoxide ; Hydrocarbons ; Statistical analysis ; Nitrogen oxides ; Motor vehicle inspection ; Automobile exhaust ; Air pollution abatement
Library Call Number Additional Info Location Last
NTIS  PB-209 258 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/23/1988
Collation 93p
An investigation was made of the feasibility of controlling exhaust emissions through a program of mandatory vehicle inspection and maintenance. Exhaust emission quantities, i.e., levels and reductions, were estimated based on a constant volume sampling (CVS) procedure. The most cost-effective inspection interval is approximately yearly regardless of the inspection/maintenance procedures applied. Inspection procedures performed in a state lane using the measurement of emission levels under load are generally more cost-effective than those performed in franchised garages using conventional diagnostic instruments, but produce smaller emission reductions. A statistical analysis of the emission reductions for the baseline and test fleets has revealed that the predicted differences in mean emission levels is significant at greater than the 90 percent level of confidence. Emission reductions are most sensitive to the inspection approach used to reject vehicles and to the extent of the imposed maintenance. (Author)