PURPOSE: To control a car at an optimum condition in accordance with the running environment of travel roads by detecting the present traveling position of the car so as to reproduce previously stored control conditions of individual portions of the car.

CONSTITUTION: Display data such as maps and control mode data stored in an external memory 10 are transfered into an RAM20. On the other hand, a departure position signal showing the departure position is output from an input controller 6 to an adder 8, where this position signal and an integrated output from an integrator circuit 3 are added and a signal showing the present position of the car is output to a memory controller 30. Various control modes previously stored in the RAM20 in accordance with running positions of the car are read out by this memory controller 30 and are output to controllers 50-1W50-3 such as car speed, head light, and air conditioner, thereby individual portions of the car are controlled at optimum conditions in accordance with the running environment of travel roads by the controllers 50-1W50-3 based on specified control modes.