     thumb|railbus that runs between kolar and bangarpet section of indian railways  :not to be confused with a train-replacement bus service a railbus is a very lightweight type passenger rail vehicle (typically non-articulated or rigid frame) that shares many aspects of their construction with a bus, usually having a bus, or modified bus body, and having four wheels on a fixed base, instead of on bogies. these railbuses, a design developed in the 1930s, have evolved into larger dimensions, performance and characteristics similar in appearance to a light railcar, and today the terms railcar and railbus are often used interchangeably. railbuses designed for use specifically on little-used railway lines were commonly employed in countries such as germany, italy, france, united kingdom and sweden.hilding carlsson and his railcar company - retrieved on 2010-04-20 today railbuses are being replaced by modern light dmu railcar designs. ==british rail railbuses==  british rail produced a variety of railbuses as a means both of building new rolling stock cheaply, and to provide services on lightly used lines economically. a variety of railbus known as pacers, which were constructed in the 1980s, are still in common use today, although they are being gradually replaced. ==german railbuses== in germany, the schienenbus was developed in the 1930s to fulfill the need for an inexpensive rail vehicle built to standard specifications on germanyâs reichsbahn (the predecessor to db) to meet the demand for cost-effective services on light railways or kleinbahnen, and the wismar railbus were pioneers in those days. these were followed after the second world war by the eventually ubiquitous uerdingen railbuses which generally ran in pairs and were a predecessor of the modern diesel multiple units. a number of serious accidents in germany in the late 1970s involving schienenbus resulted in the development and specification of larger, more robustly des
Railcars