Mode of transport carries its own motor. As of 2002, there were 591 million automobiles worldwide. Other users of roads include motorcars, motorcycles, buses, trucks, bicycles and pedestrians, and special provisions are sometimes made for each of these. For example, the use of bus lanes give priority for public transport, and cycle lanes provide special areas of road for bicycles to use. Motorcars offer high flexibility, but are deemed with high energy and area use, and the main source of noise and air pollution in cities; buses allow for more efficient travel at the cost of reduced flexibility. Road transport by truck is
Light tanks of the United Kingdom in form and the machine gun was modified for vehicle use with a pistol grip instead of the spade grips of the infantry version. The Mark III light tank suspension was made out of Horstmann coil springs controlling bogies with two rubber-lined wheel sets per bogie. This design, invented by Sidney Horstmann and exclusively used on lightweight vehicles, was also used up to the Light Tank Mk VI of the British Army. Apart from being relatively easy to build, compact and lightweight, it had the advantage of having a long travel, and of being easy to replace when damaged in