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:
- 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.
Transportation Systems Center55 Broadway, Kendall Square
Cambridge, MA United States 02142
- HOPKINS, J
- Hazel, M
- McGrath, T
- Publication Date: 1978-9
- Features: Figures; Photos; References;
- Pagination: 102 p.
- TRT Terms: Branch lines; Energy consumption; Freight trains; Fuel consumption; Piggyback transportation; Simulation; Train operations; Validation
- Old TRIS Terms: Train performance calculator
- Subject Areas: Energy; Freight Transportation; Railroads;
- 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