Technical Reports

Rail Neutral Temperature Test on CSX

Tests were conducted on CSX wood-tie track to determine the long-term stability of track in the context of rail neutral temperature. Two test sites were chosen by the FRA and CSX in Georgia: one a tangent section of high-tonnage (50 mgt/year) track north of Carterville, Georgia, and the second a 6...

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

Data gathered surrounding acquisition and use of track geometry data in maintenance-of-way planning is analyzed. The data is analyzed through development of track maintenance planning capabilities, maintenance information reports, system validation and quality index development, system description...

A Mathematical-Computer Simulation of the Dynamics of a Freight Element in a Railroad Freight Car

This research studies the dynamic response of a freight element, inside a typical freight box car under service conditions, by a computermodel simulation technique. A 27 degree of freedom mathematical model has been developed to represent the freight car, truck and freight element, with the car...

Seismic Awareness: Transportation Facilities : A Primer for Transportation Managers on Earthquake Hazards and Measures for Reducing Vulnerability Plus Appendices

The purpose of this report is to alert managers and operators of transportation enterprises, in both the public and private sector, to the dangers of earthquakes to buildings and possible precautions to be taken. The nature of seismic hazards in the U.S. is described. These include the probability...

Laboratory and Field Testing of NYCTA Power Frequency Track Circuits

This report addresses the possible electromagnetic interference between the electronic AC propulsion control systems and the signaling and train control systems. The potential exists for AC-drive propulsion systems to cause EMI that can adversely affect the operation of NYCTA's power-frequency...

Test Results Report : Dual Disc/Tread Braking and Reduced Pressure Braking Evaluation Programs

This report is the Test Results Report for the Dual Disc/Tread Brake Test. Data logs and records associated with this test are published separately in the Test Events Report Dual Disc/Tread Braking and Reduced Pressure Braking Evaluation Programs, Report No. FRA/ORD-8l/21. The Dual Disc/Tread...

High Cant Deficiency Testing of the LRC Train, the AEM-7 Locomotive, and the Amcoach

Increasing the speed of passenger trains in existing curves has been proposed as an alternative to changing curve radii for the purpose of reducing trip times on the Northeast Corridor. This test evaluates safety at high cant deficiency by comparing direct wheel/rail force measurements to safety...

Railroad Research and Development : Summary Results of 70 Ton Boxcar Testing

Tests were performed at the Transportation Test Center in Pueblo, Colorado on a 70 ton boxcar with Barber S-2C trucks in April and May of 1981. The objective of the tests was to provide definition of the dynamic properties of the freight car for application to the validation of a mathematical...

Wheelclimb Derailment Processes and Derailment Criteria

The most widely accepted criterion for wheelclimb derailment defines an upper limit for safe operation on wheel/rail contact forces on the climbing wheel, with the limit varying with time duration of the forces. For dynamic wheelclimb processes with significant lateral velocities, lateral forces...

Amtrak/Knorr Disc Brake Study : Volume 1 - Final Report

This report describes the Amtrak/Knorr Disc Brake Study which was developed: (1) To evaluate candidate replacement disc brakes for the Knorr discbrakes presently in use on Amfleet and Turboliner cars. (2) To explain the cause of the loosening of the attaching pins and the excessive wear...

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Technical Reports