00818725

Component

https://doi.org/10.3141/1750-06

http://scholar.google.com...ueza&publication_year=2001

The MOBILE6 emissions model, currently under development, uses mileage accumulation rates that assume that the average 25-year-old car has been driven more than 337,962 km (210,000 mi), and that the average 25-year-old pickup truck has been driven more than 402,336 km (250,000 mi). Cumulative mileage is used in the model to calculate emission factors that increase with mileage due to air pollution control device "deterioration." Odometer readings taken in previous studies by the Environmental Protection Agency and additional data indicate that average mileage accumulations may be much less [i.e., 201,168 km (125,000 mi)] than those used in the MOBILE6 model. This has the effect of overestimating emissions from older vehicles. A simple model is presented that accounts for scrappage of older vehicles as a function of cumulative mileage. This model predicts average cumulative mileage that is much closer to actual odometer readings (taken in Nashville, Tennessee) than the default values used in MOBILE6. The use of more accurate cumulative mileage values for older vehicles should provide improvements to the estimation of emissions from the vehicle fleet.

This paper appears in Transportation Research Record No. 1750, Energy, Air Quality, and Fuels 2001.

English

p. 49-55

2001

Transportation Research Record

0309072115

Figures (6) ; References (11) ; Tables (3)

Accuracy; Air pollution; Automobiles; Deterioration; Emission control devices; Exhaust gases; Mathematical prediction; Pickup trucks; Vehicle miles of travel

MOBILE6 (Computer model)

Aged vehicles; Cumulative mileage

Data and Information Technology; Highways; Vehicles and Equipment

TRIS, TRB, ATRI

Sep 28 2001 12:00AM

• ANALYSIS OF AGGREGATION EFFECTS IN VEHICULAR EMISSION ESTIMATION
• DESIGN AND ADMINISTRATION OF ACCELERATED VEHICLE RETIREMENT PROGRAMS IN NORTH AMERICA AND ABROAD
• EFFECTIVENESS AND EFFICIENCY OF POLICIES TO PROMOTE ALTERNATIVE FUEL VEHICLES
• EMISSIONS INVENTORY ANALYSIS OF MOBILE SOURCE AIR POLLUTION IN TEL AVIV, ISRAEL
• MICROSCOPIC MODEL OF AIR POLLUTANT CONCENTRATIONS: COMPARISON OF SIMULATED RESULTS WITH MEASURED AND MACROSCOPIC ESTIMATES
• MODELING SOAK-TIME DISTRIBUTION OF TRIPS FOR MOBILE SOURCE EMISSIONS FORECASTING: TECHNIQUES AND APPLICATIONS
• PARTNERSHIP FOR A NEW GENERATION OF VEHICLES' FUEL ECONOMY GOAL: EVALUATION OF TRADE-OFFS ALONG THE PATH
• RECENT VALIDATION EFFORTS FOR A COMPREHENSIVE MODAL EMISSIONS MODEL
• SHARED, SMALL, BATTERY-POWERED ELECTRIC CARS AS A COMPONENT OF TRANSPORTATION SYSTEM SUSTAINABILITY