A Parametric Model of the Train Delay Distribution to Improve Planning of Heavy Haul Cycle Times Shih, M-C., C.T. Dick and C.P.L. Barkan. 2017. A Parametric Model of the Train Delay Distribution to Improve Planning of Heavy Haul Cycle Times. In: Proceedings of the 11th International Heavy Haul Association Conference. Cape Town, South Africa. Files We're sorry. At this time, we do not have a full text copy of this text available. Categories Systems