In the articulated Scania bus built on the standard BR112 chassis, the engine is transversely mounted at the extreme rear. The bus is of the “pusher” type and the power unit drives the rigid rear axle. The articulated joint is designed so that no special actuating system is necessary under normal conditions. However, a control system is provided for coping with abnormal situations. In view of the fact that the same chassis Is used for two-axle buses, double-deckers and articulated buses, it has been possible to apply a high degree of standardisation to the components and the service work has been appreciably simplified. It is also easier for the drivers to handle the different types of buses.