Technical Reports

Force Environment Evaluation of Stub Sills on Tank Cars Using Autonomous Over-the-Road Testing of the Instrumented Tank Car

Fractures have been observed on stub sill tank cars for many years. Undetected and unattended, these fractures can develop into a variety of tank car failures. While tank car ruptures are rare, the potential for a catastrophic hazmat release has made this a critical issue within the industry. The...

Side Impact Test and Analysis of a DOT-112 Tank Car

As part of a program to improve transportation safety for tank cars, Transportation Technology Center, Inc. (TTCI) has conducted a side impact test on a DOT-112 tank car to evaluate the performance of the DOT-112 under dynamic impact conditions and to provide data for the verification and...

Crash Energy Management: One and Two Car Passenger Rail Impact Tests - Summary of Structural and Occupant Test Results

Two full-scale impact tests were conducted to measure the crashworthiness performance of Crash Energy Management (CEM) equipped passenger rail cars. On December 3, 2003, a single car impacted a fixed barrier at approximately 35 mph and on February 26, 2004, two-coupled passenger cars impacted a...

Reducing Major Rule Violations in Commuter Rail Operations: Distraction and Its Mitigation with Sustained Attention Training

: Transportation Services conducted two experiments in the Cab Technology Integration Laboratory (CTIL) using animated operating scenarios that were designed to simulate elements of distraction. In Study I, operational scenarios varied in task load, from baseline to low, and then to high load. The...

On-Board Failure-Protection Requirements for Railroad-Vehicle Equipment

An analysis of the 1975 railroad-equipment-caused accidents was made.

Railroad Classification Yard Technology. Design Methodology Study.

Even after bypass and intermodal train operations are fully exploited by railroads, it is clear that the railroad yard will continue to be an important factor in railroad operations because of the wide dispersal of traffic origination and destination points and the low car count of aver age...

Rail-Wheel Geometry Associated with Contact Stress Analysis

This report records the derivation of a number of results pertaining to wheel and rail geometry that are needed for the analysis of contact stresses and rolling-creepage phenomena. In particular, results utilized in the authors' computer programs COUNTACT (for COUNTerformal contACT problems) and...

Prevention of Roller Bearing-Initiated Burnoffs in Railroad Freight Car Journals

The ob j e e t i ve 0 f thi s pro gram was to de t e rmt ne the t ecnmc a i feasibility and cost effectiveness of constructing three separate devices for the prevention of catastrophic roller bearing-initiated, I railroad ;ournal failure. 1. Construction of a low cost axle cap bolt which would...

Optical Automatic Car Identification (OACI). Volume I. Advanced System Specification

Rail Safety/Equipment Crashworthiness. Volume IV. Executive Summary.

The document, the fourth of four volumes, summarizes the activities and documentation conducted under this contract. The analysis of the accident data highlighted areas where improvements could be made to improve the occupant protection of passenger rail vehicles. Design criteria were determined...

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Technical Reports