Vehicle Dynamics Models for Derailment Incident Investigation

When investigating a train derailment, vehicle/track interaction (VTI) using vehicle dynamics simulations of the key vehicles in the derailed train can help identify specific derailment causes. From September 2018 to March 2021, the Federal Railroad Administration (FRA) contracted Sharma &...

Brightline West - Las Vegas to Victor Valley NEPA Reevaluation: Attachment D: Mitigation Measure Summary

Brightline West - Las Vegas to Victor Valley NEPA Reevaluation: Appendix B - USFWS Brightline West Concurrence

Brightline West - Las Vegas to Victor Valley NEPA Reevaluation: Appendix A - Project Changes

Brightline West - Las Vegas to Victor Valley NEPA Reevaluation: Brightline West 4(f) Evaluation

Brightline West - Las Vegas to Victor Valley NEPA Reevaluation: Cover Page and Table of Contents

Washington Union Station Expansion Project: June 29, 2023 Consulting Parties Meeting

Washington Union Station Expansion Project Supplemental Draft Environmental Impact Statement (SDEIS): Public Hearing Boards - June 27, 2023

Washington Union Station Expansion Project Supplemental Draft Environmental Impact Statement (SDEIS): Public Hearing Presentation - June 27, 2023

High-Strength, Reduced-Modulus, High-Performance Concrete for Prestressed Concrete Crosstie Applications

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...