Which types of passenger cars have single-layer and double-layer buses; articulated and towed-to-trailer vehicles. There are two doors, single door type, or luggage compartment. Most passenger cars are driven by diesel engines, and there are also pure electric cars with all-metal bodies. According to the energy consumed and the road area occupied by the number of passengers, public transportation vehicles are more economical than personal vehicles. This is one of the main reasons why many countries give priority to the development of public transportation buses. , For more information, please visit http://www.keche.com