Other Reports

Technical Memorandum: Broken Rail/Open Switch Point Detection System

  • 01
  • Oct
  • 1995
AUTHOR: Parsons, Brinckerhoff, Quade, & Douglas, Inc.
SUBJECT: Facilities & Test Equipment
KEYWORDS: Transportation Test Center, Track Geometry, Catenary Systems
ABSTRACT: In the fall of 1993, an assessment was made of the existing conditions on the Railroad Test Track (RTT) at the Transportation Technology Center in Pueblo, Colorado with the objective of identifying modifications to the track structure, track geometry, catenary system and signal system to support testing of high speed passenger trainsets in the very high (125 - 150 mph) and ultra high (>150 mph) speed regimes. Since that time, several working meetings have been held to determine the scope of work and phasing of work to accomplish the above objectives. The rehabilitation/modification work has been phased to meet the limited amount of funding currently available for this program. AAR has developed a Phase I Work Plan for the Railroad Test Track Refurbishment, dated July 1995. This work plan has five tasks: Task 1. Convert existing jointed rail to continuously welded rail (CWR); Task 2. Preliminary (conceptual) design of a broken rail/open switch point detection system; Task 3. Restore overhead catenary system to original condition and upgrade the AC substation; Task 4. Change the alignment of the 0°-50'reverse curve to 1°-15'; and Task 5. Upgrade RTT turnouts. This memorandum addresses the conceptual design aspects for Task 2 and has been prepared to: Provide basic information with regard to signal system technologies that can detect broken rails and open switch points; Review the various technologies that would be acceptable for use on the RTT; and revisit the costs for installing the above technologies or variations of the above technologies recognizing that a selected system is to be installed in a test environment and that certain flexibilities may be possible that would not be possible in a revenue operating scenario.