RAILROADS AND THE ENVIRONMENT: ESTIMATION OF FUEL CONSUMPTION IN RAIL TRANSPORTATION VOLUME III. COMPARISON OF COMPUTER SIMULATIONS WITH FIELD MEASUREMENTS

This report documents comparisons between extensive rail freight service measurements (previously presented in Volume II) and simulations of the same operations using a sophisticated train performance calculator computer program. The comparisons cover a variety of lengthy freight movements over a differing terrain, for TOFC, boxcar, and branchline operations. The simulation shows excellent agreement (within 2%) for aggregated data, although some specific runs or run segments show substantial deviations. Uncertainty is typically plus or minus 10% to 15%, a range equivalent to the scatter generally found within sets of measured data. The report also includes a full description of the simulation program and a general analysis of the major factors which bear upon the validity and accuracy of train performance calculations. Proposed modifications to conventional train resistance equations are suggested.

  • Record URL:
  • Supplemental Notes:
    • Prepared for U.S. Department of Transportation, Federal Railroad Administration, Office of Research and Development, Washington, D.C. Volume I, Analytical Model, has 90 pp. Volume II, Freight Surface Measurements, has 46 pp.
  • Corporate Authors:

    Transportation Systems Center

    55 Broadway, Kendall Square
    Cambridge, MA  United States  02142
  • Authors:
    • HOPKINS, J
    • Hazel, M
    • McGrath, T
  • Publication Date: 1978-9

Media Info

  • Features: Figures; Photos; References;
  • Pagination: 102 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00188693
  • Record Type: Publication
  • Source Agency: Federal Railroad Administration
  • Report/Paper Numbers: FRA/ORD-75-74.III Final Rpt., DOT-TSC-FRA-78-16III
  • Files: TRIS, USDOT
  • Created Date: Feb 27 1979 12:00AM