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Estimating Full IM240 Emissions from Partial Test Results: Evidence from Arizona AgEcon
Ando, Amy Whritenour; Harrington, Winston; McConnell, Virginia D..
The expense and inconvenience of enhanced vehicle emissions testing using the full 240-second dynamometer test has led states to search for ways to shorten the test process. In fact, all states that currently use the IM240 allow some type of fast-pass, usually as early in the test as second 31, and Arizona allows vehicles to fast-fail after second 93. While these shorter tests save states millions of dollars in inspection lanes and driver costs, there is a loss in information since test results are no longer comparable across vehicles. This paper presents a methodology for estimating full 240 second results from partial-test results for three pollutants: HC, CO and NOx. Using random sample of vehicles in Arizona which received full 240 second tests, we use...
Tipo: Working or Discussion Paper Palavras-chave: Inspection and maintenance; Mobile source; Fast pass; Environmental Economics and Policy; Q25.
Ano: 1998 URL: http://purl.umn.edu/10734
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Fleet Turnover and Old Car Scrap Policies AgEcon
Alberini, Anna; Harrington, Winston; McConnell, Virginia D..
This paper incorporates owners' decisions to keep, repair or scrap their old vehicles into a simulation model of fleet emissions. This decision depends critically on the owner's perceived value of the vehicle, so we examine the factors affecting owners' valuations of their old vehicles using a unique longitudinal dataset. Willingness to accept for the vehicle is well predicted by mileage and condition of the car, and declines systematically with its age. Our estimated model of vehicle value is used as an input into a simulation model of a 1,000-car fleet representative of California's fleet. Other inputs into the simulation models are the estimated distributions of emissions in the fleet, and two equations that link emissions reductions to the cost of...
Tipo: Working or Discussion Paper Palavras-chave: Mobile source; Inspection and maintenance; I/M; Scrappage; Emission fees; Resource /Energy Economics and Policy; Q25.
Ano: 1998 URL: http://purl.umn.edu/10897
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Who's in the Driver's Seat? Mobile Source Policy in the U.S. Federal System AgEcon
Harrington, Winston; McConnell, Virginia D.; Walls, Margaret.
Regulation of mobile source emissions in the US has evolved as a complex combination of central government and decentralized authority. The central government required uniform new car emissions standards in the 1970 Clean Air Act, but gave states the power to meet ambient air quality standards however they saw fit, including various regulations on mobile sources. The 1990 Amendments to the Act strengthened the Federal role in some ways, by requiring tighter new car standards and more specific requirements for fuels and for vehicle emissions inspection and maintenance, but at the same time left states with a great deal of latitude to meet ambient standards and took greater recognition of regional variation in environmental problems. We examine the role of...
Tipo: Working or Discussion Paper Palavras-chave: Mobile source; Federalism; Public Economics; Q25; Q28.
Ano: 1996 URL: http://purl.umn.edu/10636
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