PROFILE: GRADIENT SIMULATION FOR RAIL HUMP CLASSIFICATION YARDS

Designers of rail hump yards traditionally execute a long, tedious manual process to optimally design hump grades and retarder placements. This design process entails checking the velocities and headways of a worstcase sequence of cars to ensure that proper values of these variables can be maintained on the gradient. The computer simulation model PROFILE automatically computes these quantities and thus frees the designer from tedious work and allows him or her to generate and study more design alternatives. The model uses the usual static (velocity-independent) rolling- resistance formulation of car rollability but includes the option of using velocity-dependent rolling resistance. User input requirements and program-generated output are described, and an example of the application of the model to a typical design problem is given.

• Record URL:
  http://onlinepubs.trb.org/Onlinepubs/trr/1980/744/744-009.pdf
• Record URL:
  https://scholar.google.com/scholar_lookup?title=PROFILE%3A+GRADIENT+SIMULATION+FOR+RAIL+HUMP+CLASSIFICATION+YARDS&author=W.+Stock&author=M.+Sakasita&author=C.+Elliott&author=P.+Wong&publication_year=1980
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0309030528
• Supplemental Notes:
  • Publication of this paper sponsored by Task Force on Railroad Operations. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
• Authors:
  • Stock, William A
  • Sakasita, M
  • Elliott, C V
  • Wong, P J
• Publication Date: 1980

Media Info

• Media Type: Print
• Features: Figures; References;
• Pagination: pp 52-58
• Monograph Title: Railroad track and facilities
• Serial:
  • Transportation Research Record
  • Issue Number: 744
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Computer programs; Design; Hump yards; Railroad yards; Rolling resistance; Speed control; Steering; Wind
• Identifier Terms: FORTRAN (Computer program language)
• Old TRIS Terms: Yard design
• Subject Areas: Design; Highways; Railroads; Terminals and Facilities;

Filing Info

• Accession Number: 00319311
• Record Type: Publication
• ISBN: 0309030528
• Files: TRIS, TRB
• Created Date: Dec 11 1980 12:00AM