LIGHTWEIGHT VEHICLE TRACK SHUNTING

The report was written in response to a standing need for a brief summary overview of the safety and reliability problems, applicable government regulations, and current status of industry developments associated with the operation of Lightweight Vehicles (LWV's) over U.S. railroad signal systems. An effort has been made to treat the subject of track circuit shunting sensitivity in as concise a manner as practicable, consistent with the phenomena associated with rolling-wheel/rail-surface resistance of LWV operation. The text describes the highly variable factors involved within wheel/rail shunting sensitivity, describes the current technological development status, and presents recommendations for technological research. It is believed that this can serve as introductory material for development of a program plan for needed FRA research aimed at economical and viable solutions to provide the level of signal system operational safety required for U.S. LWV passenger operation. An Appendix has been included covering Reference Documents, Industry Developed Instruction Manuals, Contacts of recognized experts within the field, special AAR formulas, and related information.

Record URL:
Corporate Authors:
Dyer (Thomas K), Incorporated

1762 Massachusetts Avenue
Lexington, MA United States 02173

Federal Railroad Administration

1200 New Jersey Avenue, SE
Washington, DC United States 20590
Authors:
- Dyer, T K
Publication Date: 1981-4

Media Info

Media Type: Digital/other
Pagination: 81 p.

Subject/Index Terms

TRT Terms: Bypasses; Control devices; Fail safe systems; Light vehicles; Rail (Railroads); Railroad signals; Railroads; Reliability; Rolling contact; Sensitivity; Signaling; Track circuits; Wheels
Old TRIS Terms: Controller characteristics; Fail safe; Feedback circuits; Trigger circuits
Subject Areas: Operations and Traffic Management; Public Transportation; Railroads; Vehicles and Equipment;

Filing Info

Accession Number: 00347796
Record Type: Publication
Source Agency: National Technical Information Service
Report/Paper Numbers: FRA/ORD-81/56
Files: NTIS, TRIS, USDOT
Created Date: Feb 27 1982 12:00AM