Limousines are luxury vehicles-in particular, sedans or saloons-with lengthened wheelbases. The chassis of limousines are often extended via certain automobile makers. Limousines are an expensive form of auto transport and are usually offered for rich citizens. Among the least rich, limousines are reserved for special occasions, usually weddings or funerals. The cars are usually owned by large companies, government or certain broadcasters, although they are sometimes owned by private citizens. A limousine will sometimes carry security features (for example, bulletproof glass).