There have been a number of collisions, derailments and fatal accidents at Mangotsfield. Even then train movements were sporadic and subject to frequent stoppages, derailments, capture and attack. Crime was rampant; derailments, fires, breakdowns, and assaults were commonplace. Derailments and wrecks were regular occurrences, particularly in the Midwest. There have been two derailments of Shinkansen trains in passenger service. He was transferred to Muswellbrook after causing several derailments due to falling asleep while shunting. Derailments caused no injuries over that period. As a consequence, the locomotives were involved in a number of derailments. The function of this unit is to attend incidents, such as derailments. The handling of a train can also cause derailments. Most designs enclose the running gear in the guideway to prevent derailments. Rock Island began to take on a ramshackle appearance and derailments occurred with increasing frequency. In 2002, two derailments on other routes took numerous Superliner cars out of service. Rails were laid on thin beds and badly secured leading to many derailments. This was a major factor in three serious derailments between 1969 and 1994.