Railbus
lightweight passenger rail vehicle that shares many aspects of its construction with a bus
The rail bus train can be found in many different countries, they are known as the pacer or the cooker trains in the United Kingdom due to the loud noises and how hot the air was in the trains.
They were made to respond to the outcry for more trains than buses, while saving money with a cheap design. They used the bodywork and engine of a bus and placed them on a train chassis.