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Keywords: Ballast behavior, discrete element modeling, DEM, Discrete Element Method, triaxial test, fouling, dynamic train loading, ballast degradation and image analysis
Abstract: An innovative integrated computational-experimental laboratory testing framework has been developed at the University of Illinois at Urbana-Champaign to evaluate clean and fouled...
Keywords: head-on collision, Norfolk Southern, Georgetown, KY
Abstract: On Sunday, March 18, 2018, at 11:14 p.m., EDT, southbound Norfolk Southern (NS) freight train 175T817 (Train 1) passed an absolute stop signal without authority and was struck...
Keywords: Accident Investigations, Union Pacific
Abstract: On February 3, 2017, at approximately 8:55 p.m., CST, southbound Union Pacific Railroad (UP) Coal Train CWTCL9-01, with 2 lead locomotives, 2 distributed power locomotives at the...
Keywords: Locomotives; rail cars; override; collision; injury; impacts
Abstract: The Federal Railroad Administration (FRA) and the John A. Volpe National Transportation Systems Center (Volpe Center) are continuing to evaluate new technologies for increasing...
Keywords: Concrete railroad ties, alkali-silica reaction (ASR), delayed ettringite formation (DEF), impact echo, material analysis, prestressing tendons, degradation mechanisms, petrographic analyses, bursting and splitting forces, transfer strength and length
Abstract: Simpson Gumpertz & Heger Inc. conducted an investigation into the factors that caused widespread failure in prestressed concrete railroad ties on the Northeast Corridor. The...