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Lightweight Vehicle Track Shunting

The objective of this contract was to determine the extent of the shunting problem on lightweight rail vehicles and identify research recommendations to resolve it. This study discloses that special precautions must be taken before single-unit lightweight railroad cars can be operated on common...

Investigation of Design Standards for Urban Rail Transit Elevated Structures

The purpose of this report was to review the various criteria for design of elevated rail transit structures currently in use by selected transit properties and to compile them in one source. The criteria was to be reviewed to determine the differences and similarities between them. An evaluation...

Interactive Simulation and Computer Graphics for the Quasi-Static Lateral Train Stability Model

The AAR's Quasi-Static Lateral Train Stability (QLTS) Model has been modified to include interactive graphics for a visual display of the simulated results. The interface program also allows the user to select the variables of interest prior to plotting the results. The program development utilized...

International Conference on Wheel/Rail Load and Displacement Measurement Techniques

The International Conference on Wheel/Rail Load and Displacement Measurement Techniques was held at the Transportation Systems Center (TSC) on January 19-20, 1981. The Conference was sponsored by the U.S. Department of Transportation (DOT) and Transport Canada. The U.S. DOT agencies involved in...

Interactive Simulation and Computer Graphics for the Detailed Longitudinal Train Action Model

The AAR's Detailed Longitudinal Train Action (DTAM) Model has been modified to include interactive graphics for a visual display of the simulated results. The interface program also allows the user to select the variables of interest prior to plotting the results. The program development utilized...

Improvement in Magnetic Techniques for Rail Inspection

Current inspection of rail for internal defects is carried out by ultrasonic and/or magnetic techniques. This report covers work directed toward advancing present-day magnetic technique for inspecting rail for internal flaws. The major emphasis was placed on improving the speed and detectability of...

Prototype Next Generation Frog Foundation – Preliminary Evaluation

A frog foundation research project, jointly funded by the Federal Railroad Administration and Association of American Railroads, and conducted at the Facility for Accelerated Service Testing (FAST), tested a flexible frog crossing diamond prototype and it performed as intended.

Hopper vs. Tank Car Truck Loads

This report describes the results of tests conducted at the Transportation Test Center (TTC) in Pueblo, Colorado to ascertain differences between the ride characteristics of a hopper car with D-5 and D-3 springs and those of a tank car with D-3 springs. Testing involved operating speeds of 10 to 60...

Fundamental Studies Related to Wheel/Rail Contact Stress

This Final Report summarizes the research performed and-provides a brief review of the major results of the program. The problems discussed include: the development of cost-effective methods for finding the wheel-rail contact patch, finding subsurface internal stresses, determining points where...

Freight Car Dynamics: Final Report

The objective of this research project was to develop techniques to analyze the lateral dynamic behavior of railroad freight cars. The effort included development and correlation of theoretical techniques for predicting freight car dynamic behavior, and use of the techniques to investigate the...

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