When the vehicle reaches the on-ramp, turn on the left turn signal, look back to the left to observe the car. After confirming safety, accelerate into the lane to the minimum speed limit and drive normally, turn off the turn signal. When it is necessary to change the following lane, the turn signal on the side ready to enter the lane should be turned on to observe the incoming vehicle and change the lane after confirming the safety. When driving off the highway, adjust the speed and lane ahead of time according to the exit warning sign.