The present invention relates to a combined steering and brake control system for vehicles and, in particular, to a mechanically combined steering and brake control system for use in safely controlling a vehicle configured for drivers with limited body movement, such as drivers having use of only one or no limbs. The invention further relates to a steering control system including a variable radius crank which enables the driver to select an appropriate crank radius. The invention further relates to a vehicle incorporating one or a combination of the control systems.
