Maximum Curving Speed

Full equilibrium superelevations are rarely installed on tracks. Consequently, trains run on unbalanced superelevations. Currently, the maximum curving speed is modeled with blanket unbalanced superelevations. Blanket unbalanced superelevations are not desirable for all actual superelevations, regardless of their values. In this paper, the maximum curving speed is modeled to ensure comfort and safety, considering two primary parameters: the curve parameters and the vehicle characteristics. The curve parameters include radius and actual superelevation, and the vehicle characteristics include the height of the center of gravity (c.g.) on top of the rail and the suspension factor. The proposed model has interesting features. It suggests that unbalanced superelevation is proportional to actual superelevation. The maximum curving speed is evaluated against the normal operating speed as the base reference. The model is applied and validated from the point of view of both comfort and safety. The paper suggests a method to divide equilibrium superelevation into actual and unbalanced superelevations.

• Record URL:
  • https://doi.org/10.1061/(ASCE)TE.1943-5436.0000648
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/8674831
• Supplemental Notes:
  • Copyright © 2013 American Society of Civil Engineers.
• Authors:
  • Hasan, Nazmul
• Publication Date: 2014-4

Language

• English

Media Info

• Media Type: Web
• Features: References;
• Pagination: 04013023
• Serial:
  • Journal of Transportation Engineering
  • Volume: 140
  • Issue Number: 4
  • Publisher: American Society of Civil Engineers
  • ISSN: 0733-947X
  • Serial URL: https://ascelibrary.org/journal/jtepbs

Subject/Index Terms

• TRT Terms: Center of gravity; Curved track; Passenger comfort; Railroad tracks; Superelevation; Traffic safety; Traffic speed
• Subject Areas: Operations and Traffic Management; Railroads; Safety and Human Factors; I72: Traffic and Transport Planning; I82: Accidents and Transport Infrastructure;

Filing Info

• Accession Number: 01502581
• Record Type: Publication
• Files: TRIS, ASCE
• Created Date: Dec 30 2013 11:05AM