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High-performance concrete (HPC) with early strength development is the material of choice for fabricating prestressed concrete railroad ties. However, the higher strength of HPC results in significantly higher elastic modulus values and increases the rigidity of the tie, leading to higher...
This report characterizes the amplitude and wavelength content of the current track geometry environment of the United States railroad system and examines the combination of geometric parameters for different operational conditions. The analyzed track geometry dataset consists of over 49,000...
Between September 2019 and June 2022, the Federal Railroad Administration (FRA) sponsored a research team from Sharma & Associates to model and test the torsional strength of a passenger car coupling system to understand the performance of coupling systems in train accidents and to enhance...
Detecting poor track conditions before they become safety-critical is essential for improving the safety and efficiency of railroads. To this end, autonomous track inspection technologies are beneficial, since established manual inspection methods are time-consuming and require significant track...
The Federal Railroad Administration (FRA) Office of Research, Development, and Technology and the Association of American Railroads (AAR) support research conducted by Transportation Technology Center, Inc. (TTCI) on the root cause of wheel-related accidents. The purpose of this project was to...