| 摘要 |
PURPOSE:To accurately indicate the low speed state of a preceding car to a succeeding car and prevent a car crash accident on a highway, etc. by determining through a control circuit that the car speed is below a preset value and indicating the state using an actuating device. CONSTITUTION:An actuation switch 1 is set to ON when a car goes on a specific road on which the low speed indication of the car is required and issues the signals to a control circuit 3. The control circuit 3 determines the speed sent from a speed sensing device 2 in accordance with the signals issued from the actuation switch 1 and sends this determination result to an actuation switch 4. The actuation switch 4 lights or flashes a low speed indicator lamp 5 and an intra-car alarm lamp 6 in accordance with the speed from the control circuit 3. As a result, the low speed state of a preceding car is indicated accurately to a succeeding car and a car crash accident, etc. are prevented on a hightway, etc. |
