What is the appropriate engine speed for high-speed driving?

[StDylan]

When driving at high speeds, it is appropriate to keep the engine speed between 2000 and 3500 RPM. Precautions for high-speed driving include: 1. Quickly accelerate to a certain speed when entering the main lane from the ramp; 2. Do not obstruct vehicles already driving in the main lane when merging; 3. Always pay attention to roadside and road signs and markings, and drive appropriately to the right; 4. Maintain a safe longitudinal distance between vehicles; 5. When overtaking, use the left turn signal and honk the horn, passing the vehicle ahead from the overtaking lane; 6. In case of an emergency requiring a stop, quickly signal to the right, slow down and stop in the emergency lane, turn on the hazard lights, and place a warning sign behind the vehicle; 7. Distinguish lane functions and drive in the appropriate lane.