Major Factors Affecting Passenger Train Accident Occurrence and Severity in the United States: 1996 – 2015 Lin, C-Y., M.R. Saat and C.P.L. Barkan. 2018. Major Factors Affecting Passenger Train Accident Occurrence and Severity in the United States: 1996 – 2015. In: Proceedings of the Transportation Research Board 97th Annual Meeting. Washington, D.C., January, 2018. Files We're sorry. At this time, we do not have a full text copy of this text available.