I really doubt this. You're using a vehicle that was designed to be run on street with slow average speeds - a tram style service, in a metro style service where its constantly running at high speeds and is constantly being abused by large crowds. Its like pulling a trailer with an SUV - technically possible but don't be surprised when things quickly start breaking down.The derailment and these issues have nothing with the type of vehicle. It has to do with lack of experience and poor management. Lack of oversight.