Technical Reports

Validating a 70-Ton Higher Speed Freight Truck Design: Phase II

Previously, Phase I of this project demonstrated viable market potential and operating economics for high speed freight service, and established that the higher speed truck (HST) prototype design is capable of meeting the dynamic and structural requirements expected in higher speed freight...

Wireless Digital Train Line for Passenger Trains

This research project evaluated current wireless communication standards used by high-speed passenger rail services around the globe and determined, based on those findings, an architecture design suitable for U.S. high-speed rail implementations that addresses application requirements,...

Impact Test Data Analysis for Load Environment Characterization of Tank Car Stub Sill During Yard Operations

Fractures in the stub sills of tank cars pose a significant problem for the rail industry due to the potential for damage to the tank structure and eventual release of the contents.  Previous research by the Federal Railroad Administration (FRA) revealed that high magnitude coupling forces...

Railroad Wireless Communications Roadmap

The Federal Railroad Administration (FRA) sponsored a project conducted by Transportation Technology Center, Inc. (TTCI) to analyze railroad wireless communication needs and future uses. TTCI examined the railroads’ general wireless communication needs and future uses, and analyzed in further...

Positive Train Location End-of-Train Final Report

The overall goal of the Positive Train Location (PTL) end-of-train (EOT) project was to build on the successes of the PTL Phase II project and further refine the use cases, review/modify PTL EOT segment requirements, and identify a path forward for addressing technical issues from the previous...

Laser Triangulation for Track Change and Defect Detection

Pavemetrics Systems Inc. teamed with Amtrak to demonstrate the feasibility of automated track change detection using its Laser Rail Inspection System (LRAIL). LRAIL is a rail inspection system based on the principle of laser triangulation and combines pulsed high-power, invisible, laser line...

Evaluation of Risk Acceptance Criteria for Transporting Hazardous Materials

This report reviews and offers recommendations from Sandia National Laboratories of risk acceptance criteria for the transportation of hazardous materials in the U.S. The risk criteria should be used with the results of a quantitative risk assessment (QRA) in risk acceptance decision-making. The...

Relationship Between Track Geometry Defects and Measured Track Subsurface Condition

This report presented the results of a comprehensive study regarding the development of a probability model for occurrence of track geometry defects as a function of key subgrade parameters, measured by Ground Penetrating Radar (GPR). The analysis used multiple track geometry runs and the...

Methods for Evaluation of Track Inspection Technology Effectiveness

Guidelines, including recommendations for sample size, are needed in the design of track inspection technology evaluation tests. This report provides and overview of recommended methods for evaluating the effectiveness of different types of track inspection systems. These methods produce...

Laboratory Study of the Failure Characteristics of Fouled Ballast: Phase II

This report presents the results of a series of triaxial tests and modified box tests performed on abraded ballast at the University of Massachusetts Amherst. While Phase I involved the same tests performed on highly angular ballast, this phase is broken into two parts: Phase IIa and IIb. Both...

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Technical Reports