Part four in Macfarlane's railway safety series focuses on rolling stock including a simplified explanation of the complex interaction of the train with the track, with an emphasis on the structural integrity and crashworthiness of passenger trains. It also addresses fire on the train (less dc power arcs) and other aspects of rendering the train itself safe for passengers. The dangerous-goods chapters include the story of the worlds biggest such derailment that released 2 001 tonnes of dangerous chemicals in Livingstone, Lousiana, USA. Author Ian McFarlane.