Safely transporting hazardous and/or fragile materials is common in our modern world. Many types of engineers are involved with this type of activity. Mechanical and civil engineers design most of the systems that move these materials. The primary design goal of such systems is to carry a given object to its destination. Often, the starting point, path taken, or destination bring dangerous cargoes close to environmentally sensitive or populated areas where the consequences of an accident are serious and many times life threatening. Figure 1 shows a long train climbing into the mountains in a western state. This train is transporting fuel coal that could pollute mountain streams if the train derailed!