A simple linear relation between fuel consumption per unit distance, phi and trip time per unit distance T, phi equals k sub 1 plus k sub 2 multiplied by T is established for the fuel data collected in Austin and Dallas, Texas, and Matamoros, Mexico. The qualities of traffic service in these cities are compared through the study of the spread of the data points along the phi, T trend, showing that the Matamoros data in general have higher phi and T values. The fuel consumption model phi equals k sub 1 plus k sub 2 multiplied by T is improved by the addition of a term proportional to delta N sub s(T), the deviation of the number of stops for a given datum point from the average number of stops associated with the trip time interval into which the datum point falls. It is shown in the resulting new model, phi equals k sub 1 plus k sub 2 multiplied by T plus k sub 3 delta N sub s, that since T and delta N sub s are virtually uncorrelated, the values of k sub 1 and k sub 2 in the simpler model remain unchanged. A discussion of the physical interpretation of the model parameters is presented. In addition, an analysis of data obtained in central London shows that k sub 1 depends almost entirely on vehicle mass. It is also shown that the value of the parameter k sub 3 is approximately given by the product of the warmed-up idle fuel flow and the average stop duration.

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  • Corporate Authors:

    Operations Research Society of America

    428 East Preston Street
    Baltimore, MD  United States  21202
  • Authors:
    • Herman, R
    • Ardekani, S
  • Publication Date: 1985-2

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00452217
  • Record Type: Publication
  • Source Agency: National Highway Traffic Safety Administration
  • Report/Paper Numbers: HS-038 621
  • Files: HSL, TRIS, USDOT
  • Created Date: Jan 31 1986 12:00AM