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Vehicle Track Stiffness Measurement System (VTSM): Phase 1 Progress Report

The following is an interim progress report covering the development work on a prototype Vertical Track Stiffness Measurement system (VTSM). The Federal Railroad Administration’s Office of Research and Development has begun development of a prototype, dynamic track stiffness measurement system...

Vehicle/Track Interaction Tests on Heavy Tonnage Loop

Two vehicle/track interaction tests were conducted by Transportation Technology Center, Inc. (TTCI) at the Facility for Accelerated Service Testing (FAST), Pueblo, Colorado. TTCI, a subsidiary of the Association of American Railroads (AAR), performed the tests on FAST's Heavy Tonnage Loop (HTL) in...

The Department of Transportation on Civilian Use of the Global Positioning System (GPS): The Nationwide Differential Global Positioning System and Additional Civilian GPS Signals

The U.S. Department of Transportation (DOT), in its role as the lead agency within the U.S. Government for all Federal civilian Global Positioning System (GPS) matters, is cooperating with other departments, including the Department of Defense (DOD) and the Department of Commerce (DOC). Together,...

Test and Evaluation of Rail Flaw Detection Technologies

Internal flaws in rail occur as a consequence of the accumulation of fatigue under repeated loading. Inspection of the rail to detect flaws before they progress to complete failure is thus very important. Advanced nondestructive inspection techniques are being pursued to improve rail safety,...

Suggestions for Effective Railroad Tank Car Loading/Unloading Training Programs: Instructional Methods

Non-accident release (NAR) of hazardous materials from railroad tank cars is a source of concern for chemical manufacturers, railroads and the Federal Railroad Administration. An effective training program for individuals responsible for loading/unloading the substances from railroad tank cars...

Safety of Passenger Vehicle Dynamics: Simulation and Test Correlations for a Passenger Car with Non-Equalized Trucks

This report presents a summary of the field test results and correlations with computer simulation for a rail passenger car which has non-equalized trucks. The tests and OMNISIM simulation correlations included vehicle response to variations in vertical alignment, steady curving with spirals,...

Implementation of Positive Train Control: Report to the Federal Railroad Administrator

This Report of the Railroad Safety Advisory Committee (RSAC) describes the status of efforts to develop, test, demonstrate and deploy Positive Train Control (PTC) systems and describes actions that should be taken to provide an appropriate climate for implementation of those systems. The report...

Human Factors Phase IV: Dynamic Risk Estimation Using the Safety State Model

This report covers the theoretical development of the safety state model for railroad operations. Using data from a control automation experiment, experimental applications of the model is demonstrated. A stochastic model of system behavior is developed which is used to estimate the dynamic risk...

Demonstration of High Speed Track Maintenance Using Objective Gage Strength Data

This report presents the results of the FRA sponsored project “Demonstration of High Speed Track Maintenance Using Objective Gage Strength Data”. This activity, which is part of the FRA’s Next Generation High Speed Rail Program, is aimed at the development of “maintenance” criteria for track...

Automated Measurements of Lateral Track Panel Strength and Examinations of Track Maintenance Effects Using AAR's Track Loading Vehicle

This report summarizes test results and findings under the project "TLV Track Panel Shift and Lateral Track Strength Tests." The project was jointly funded by AAR and FRA. These tests were performed primarily off-site on Norfolk Southern revenue tracks, but a significant portion of tests was...

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