The History of Bus dates back to the early 19th Century. In the early 1830's Sir Goldworthy Gruney from the UK had designed some kind of a Hugh stagecoach, which was powered by steam engine. This was probably the first kind of bus developed by mankind. However, the concept of buses has drastically changed in today's world.
However, after the first breakthrough in 1830, the development of buses took a new stage in 1895. It was during this time, that the first passenger bus with four to six horse power single cylinder engine was made in Germany. The modern term bus had come form the Latin word "Omnibus", meaning "for all". And, by the 1915, bus service had started throughout the world. And slowly the Horse-Drawn Carriage and the Electric-Trolley cars were replaced by Buses.
Initially, the structures of Buses were not very different from trucks. They used to share the same kind of chassis with a different body. However, in 1922, an American Firm for the first time had developed a chassis especially for bus service. It's a little different from the truck chassis, which is a foot higher than that of the bus chassis. It also had a front mounted engine, a wide tread and an extra long wheelbase. However, later an integral frame was developed for better performance. Soon after that, the gasoline electric buses were introduced and a few years later the diesel powered Buses came into being. Later in the 1950's air suspension was first implemented in the passenger Buses. Compared with the buses of the yesteryear's today's buses consume more fuel, but at the same time are also more powerful than the buses of the past.
Buses as we know them today first appeared about 1900 and in some ways have changed substantially and in other ways have changed little. This brief history of buses is wildly incomplete but should serve as a good starting place for following discussions.
The first regular bus service was started in Paris in the 1660's. It's invention is credited to Blaise Pascal, a famous mathematician and scientist. Buses were distinguished from taxis and other coaches because they ran on fixed routes, on a regular schedule, and with lower fares. The system was successful during it's year-long trial, but was abandoned on Pascal's death.
In about 1900, most public transit was horse-drawn cabs and coaches, horse- electric- or coal-powered rail vehicles, or water craft. As gasoline motors became practical, companies started using mufti-passenger vehicles to provide transportation where rails and water transportation were not available. Buses became more and more popular in part because of their speed compared to horses and their flexibility compared to rail vehicles.