eLibrary
Longitudinal Resistance Modeling for Frozen Ballast
On behalf of the Federal Railroad Administration (FRA), Transportation Technology Center, Inc. (TTCI) developed a “proof-of-concept” finite element (FE) longitudinal resistance model to simulate a rail break based on historical data. Longitudinal track resistance (fo) is an important parameter...
Spike Loading Environment in Various Wood Tie Fastening Systems
The Federal Railroad Administration (FRA) contracted with Transportation Technology Center, Inc. (TTCI) to investigate the spike loading environment in various wood-tie fastening systems. The goal was to understand how dynamic loads are transferred to the spikes in wood-tie fastening systems and...
Evaluation of Engineered-Polymer Composite Tie Performance in Revenue Service
The Federal Railroad Administration (FRA) and the Association of American Railroads (AAR) investigated the in-track performance of engineered-polymer composite (EPC) ties. This report summarizes the results from a revenue service test conducted by the Transportation Technology Center, Inc. (TTCI...
Onboard Broken Rail Detection Research and Development
The Federal Railroad Administration (FRA) sponsored a project, performed by Transportation Technology Center, Inc. (TTCI), to research the feasibility of an Onboard Broken Rail Detection (OBRD) concept. A parallel long term track impedance characterization effort was undertaken with the...
Development of Locomotive Powered Freight Car Electrical Power Supply System (EPSS): Method for Electrical Power Distribution on Freight Trains
The Federal Railroad Administration (FRA) previously demonstrated advanced, remotely controlled, electro-mechanical systems, such as hand brakes, angle cocks, and cut levers that can contribute to increased safety and improved efficiency of freight railroad operations. The main impediment to...