The main difference between a railcar and a trolleybus is the presence or absence of a track. The self propelled material handling trolley does not need rails. It can walk directly on the ground. Secondly, the wheel of the self propelled material handling cart uses a polyurethane rubberized wheel, which does not cause damage to the ground. The polyurethane rubberized wheel has a small coefficient of friction with the ground, which is good for handling materials.