Technical Reports

Standby Power for Railroad-Highway Grade Crossing Warning Systems

The requirements for standby power at railroad-highway grade crossings, as established by the states, the Association of American Railroads, and the individual railroads, are described. Standard means of satisfying these requirements, using 115 vac primary power and storage batteries for standby,...

Proceedings of the Annual Railroad Engineering Conference (12th), Held at Pueblo, Colorado on October 23-24, 1975. Effect of Heavy Axle Loads on Track

The report presents proceedings of the 1975 Railroad Engineering Conference held at Pueblo, Colorado, October 23 and 24, 1975. Sessions included track developments, suspension developments and track/train interaction. Eighteen papers were presented by authors from the United States, Canada,...

Tracked Levitated Research Vehicle Periodic Test Summary Report Independent Cushion Suspension in Perturbed Guideway. Aeropropelled

The results of the first tests of the Tracked Levitated Research Vehicle (TLRV) in the Independent Cushion Suspension mode over the perturbed guideway at the Transportation Test Center (TTC) are presented. Vehicle dynamic response behavior is discussed for the speed range from 0 to 90 mph,...

Linear Friction Welding for Constructing and Repairing Rail for High Speed and Intercity Passenger Service Rail.

This project developed a solid-state welding process based on linear friction welding (LFW) technology. While resistance flash welding or thermite techniques are tried and true methods for joining rails and performing partial rail replacement repairs, large heat inputs and residual stresses (...

Locomotive Fuel Vapor Reclamation System Field Evaluation and Cost-Benefit Analysis

This report summarizes the results of the work performed to install a diesel vapor reclamation unit (DVRU) on an SD70 MAC locomotive of BNSF Railways and its performance evaluation during freight railroad service. One complete DVRU with several sensors for monitoring fuel and ambient temperatures...

Geothermal Switch Heater Installation, Testing and Monitoring – Phases 1 & 2

Transportation Technology Center, Inc. (TTCI), Norfolk Southern (NS), and John A. Volpe National Transportation Systems Center (Volpe) completed Phases 1 and 2 of a project on a working prototype geothermal switch heating system designed to test the concept and efficiency of using low-temperature...

Providing Wireless Bandwidth for High-speed Rail Operations

This project examined the possibility of providing wireless communication for train control systems on American high-speed trains. In this study, the key issue is that the frequencies allocated for rail operations in the U.S. and the frequencies used by GSM-R in other parts of the world have...

Cost/Benefit Analysis of Head Shields for 112A/114A Series Tank Cars

A cost/benefit analysis of head shields installed on new and existing 112A/114A series pressure tank cars was performed based on a redistribution of accident dollar losses. Head shields are designed to prevent puncture of a tank car head during an accident with resulting loss of lading and possibly...

Acquisition and Use of Track Geometry Data in Maintenance-of-Way Planning

The report describes data acquisition by the FRA Measurement Cars and subsequent use of the collected track geometry data by the Bessemer and Lake Erie (B and LE) and the Denver and Rio Grande Western (D and RGW) Railroads. These two railroads, in conjunction with ENSCO, Inc., have prepared the...

Computer Simulation of Tank Car Head Puncture Mechanisms. Classification Yard Accidents.

A number of railroad accidents have been aggravated by couplers puncturing the shell head of hazardous material tank cars. Development of means for identifying possible puncture mechanisms and quantifying the coupler forces involved is the subject of this report. A mathematical model, capable of...

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Technical Reports