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HQ-NS-2022-0305-1543
On March 5, 2022, at 1:58. a.m., EST, a Norfolk Southern (NS) freight train (Y92H202) derailed at Milepost 71 on the Northeast Corridor in Perryman, Maryland, resulting in 20 cars derailed and $2,665,277 of damage to rail equipment and track. There were no injuries reported.
The...
HQ-2022-1488
On Tuesday, January 25, 2022, at approximately 9:30 a.m., CST, a Canadian Pacific Railway (CP) train (B36-19) collided with a school bus at the 130th Avenue highway-rail grade crossing (DOT# 385195D) in the city of Castalia, Winneshiek County, Iowa.
The school bus had three occupants,...
The Complexities of Rail Suicide Data
This document highlights the complex nature of rail suicide data collected from international peer-reviewed articles, and from the United States. The purpose of this effort is to identify the types of rail suicide data that exist, and to understand how they can be used to develop and select...
Demonstration of Mechanics-Based Track Geometry Deterioration Models
The Federal Railroad Administration (FRA) contracted Transportation Technology Center, Inc. (TTCI) to expand on existing mechanics-based ballast condition forecasting models. This report demonstrates how one of the mechanics-based models performs against field data and makes recommendations for...
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...