A search was conducted for a method to estimate motor vehicle fuel consumption and vehicle emissions in an urban driving environment which would require a minimum of field data collection and processing effort. It was found that average transient speed as measured by travel time is a good composite parameter reflecting stops and slowdowns and is closely correlated with fuel consumption and vehicle emission rates. Data was obtained for fuel-speed and emission-speed profiles for a 1980 typical mix of passenger cars, single unit trucks, tractor-trailers and busses. Tables and figures of this data are provided for easy reference. Fuel consumption projections for 1981 through 1983 are also presented for these vehicle categories. The supplied data and computational procedure provides a relatively easy and straightforward approach for estimating fuel consumption and emissions and can be used to gain insight into existing traffic operations and the merits of proposed or actual flow improvements. A sample problem is also provided which shows step by step computations for calculating the annual fuel consumption and emissions for peak and off-peak periods for a typical urban arterial, two miles long and with 11 signalized intersections. The annual fuel consumption is calculated to be about 2,400,000 gallons and vehicle emissions about 4,300,000 lbs. A comparison with a similar arterial street operating at 5 mph higher average speed showed reduced fuel consumption by about 360,000 gallons (15%) and reduced emissions by about 900,000 lbs. (22%). (Author)

  • Corporate Authors:

    Federal Highway Administration

    Engineering Research and Development Bureau, 1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Raus, J
  • Publication Date: 1981-4

Media Info

  • Features: Appendices; Figures; References; Tables;
  • Pagination: 51 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00342363
  • Record Type: Publication
  • Report/Paper Numbers: FHWA-TS-81-210
  • Files: TRIS, USDOT
  • Created Date: Jan 29 1982 12:00AM