Development of integrated model for assessment of operational risks in rail track

Rail operating risks have been increasing due to increasing number of axle passes, steeper curves, wear-out of rails and wheels and inadequate rail-wheel grinding, poor lubrication and reduced maintenance. In 2000, the Hatfield accident in UK killed 4 people and injured 34 people and has lead to the cost of pound 733 million (AUDS 1.73 billion) for repairs and compensations. In 1977, the Granville train disaster in Australia killed 83 people and injured 213 people. These are related to rolling contact fatigue, wear and poor maintenance. This paper focuses on development of a conceptual integrated model for rail grinding, lubrication and inspection maintenance decisions. Risk based cost benefit model is developed for optimal inspection intervals.