Technical Reports

Stub Sill Tank Car Research Project Results of a 15,000-mile over-the-road Test

The Federal Railroad Administration (FRA) contracted with the Association of American Railroads (AAR), Transportation Test Center (TTC) - now known as the Transportation Technology Center - Pueblo, Colorado, to study in-revenue service loads on stub sill constructed tank cars. Over 162,000 of...

Phase I Literature Search and Evaluation for Damage

Tank Car Thermal Analysis, Volume II: Technical Documentation Report for Analysis Program

The computer program AFFTAC is described. The program can be used to analyze the behavior of railroad tank cars when subjected to fire. It is designed to perform the analyses which are required to determine if a tank car meets the requirements of the Code of Federal Regulations, Title 49, Part 179...

Tank Car Thermal Analysis, Volume I, User's Manual for Analysis Program

Improved Source Location Using Sensor Arrays

The purpose of this research was to develop a sensor array capable of identifying the location of acoustic sources. The sensor array was constructed from a polymer known as PVDF. The array was created using an etching technique similar to that used for printed circuit boards. An amplifier was...

Railroad Tank Car Nondestructive Methods Evaluation

An evaluation of nondestructive testing (NDT) methods, authorized for use in replacing the current hydrostatic pressure test for qualification or re-qualification of railroad tank cars, has been performed by the Transportation Technology Center, Inc. (TTCI), a subsidiary of the Association of...

Effects Of Coupler Height Mismatch On The Structural Integrity Of Railroad Tank Car Stub Sills

This project evaluated the safety implications of coupler height mismatches on the integrity of railroad tank car stub sills, through a series of static and impact tests. The test car was a loaded tank car instrumented with strain gages at critical locations. Static tests consisted of squeeze...

Rail Industry Job Analysis: Freight Conductor

This document describes the results from a job analysis that was conducted for the position of Freight Conductor. Key aspects of the position were identified, including main tasks and knowledge, skills, abilities, and other characteristics (KSAOs) needed to carry out the requirements of the job...

A Preliminary Examination of Railroad Dispatcher Workload, Stress, and Fatigue

This report presents the methods, findings and recommendations from a field study that examined the sources and levels of railroad dispatcher workload, stress, and fatigue. The study was initiated in response to concerns raised by two Federal Railroad Administration safety audits of dispatching...

Understanding How Train Dispatchers Manage and Control Trains: Results of a Cognitive Analysis

This report documents the results of a Cognitive Task Analysis that examined how experienced railroad dispatchers manage and schedule trains in today’s environment. The objective was to understand the cognitive demands placed on railroad dispatchers and the strategies that experienced...

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Technical Reports