A steering bar for a lever-controlled vehicle provides for single hand operation of the lever-controlled vehicle. For example, the steering bar couples to the control levers for a zero-turn mower, providing safer, easier operation of the mower and making the mower handicap accessible. The steering bar can easily be installed on any dual steering zero turn mower. Steering is easier because turning it controlled by rotating the steering bar either right or left, with control of forward and reverse movements by pushing or pulling the bar. Speed, turning direction, or motion forward or reverse are all controlled by a single bar with a single hand. The steering bar is coupled with a selectively extensible control shaft to accommodate for the differing displacement length between the control levers during turning movements. The steering bar is coupled with the control levers with a ball and socket joint.