When driving an auto car on the highway, you must obey all traffic laws. Always stay in the right lane unless you are passing another vehicle. The speed limit should be followed at all times. Use turn signals when changing lanes or merging onto the highway. Keep a safe following distance from the vehicle in front of you. Avoid distractions and stay alert at all times. If you need to exit the highway, move into the appropriate lane early and use your turn signal to alert other drivers.