PURPOSE: To improve workability by regulating a governor link easily without requiring special parts or experienced regulation skill.

CONSTITUTION: An ABS/TRCECU reciprocates a governor actuator when a regulation instruction signal is inputted to recognize a mechanical actuation range of the governor actuator. In addition, it sets a lower limit position A of a stroke of the governor actuator including offset quantity corresponding to a vehicle sort, and decides a servo position in the maximum speed reduction of a governor link at the time of TRC corresponding to the position A. Next, effective stroke quantity of the governor actuator is added to the position A to set an upper limit position B of the stroke of the governor actuator, and the servo position in the minimum speed reduction at the time of TRC is decided corresponding to the upper limit position B. Obtained position control information of the governor actuator is stored in a memory in the ABS/TRCECU.