Affiliation:
1. U.S. Department of Transportation, Volpe National Transportation Systems Center, 55 Broadway, Cambridge, Mass. 02142
Abstract
Nonattainment areas taking advantage of EPA’s modified enforcement of the 1990 Clean Air Act mandates for unpopular emissions control measures will be required to identify alternative measures to reduce emissions, and several areas have indicated their intention to implement scrappage programs for older vehicles as a means of “replacing” the emissions reductions originally expected to result from these other measures. The potential reductions in fleetwide motor vehicle emissions from scrappage of all older light-duty vehicles in a typical urban area’s fleet are analyzed, and the sensitivity of those reductions to the timing of the program’s implementation and to alternative assumptions about more intensive use of vehicles remaining in the fleet are explored. The cost-effectiveness of such a program in reducing ozone precursor emissions is investigated and the reliability of estimates of the program’s effectiveness developed by using the MOBILE5a vehicle emissions model are evaluated. The likely emissions reductions from even so comprehensive a vehicle scrappage program cannot replace those anticipated to result from measures such as enhanced inspection and maintenance and sales of reformulated gasoline, but smaller-scale retirement programs may be a cost-effective element of a larger package of emissions reduction strategies.
Subject
Mechanical Engineering,Civil and Structural Engineering
Cited by
15 articles.
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