When operating a heavy diesel truck in high-altitude plateau regions (e.g., above 3,000 meters elevation in Western China), what operational changes must the driver anticipate?

1. Lower atmospheric oxygen reduces engine power output, cooling system boiling point decreases, and extended braking distances occur due to reduced air density
2. Engine power increases by 50% due to reduced atmospheric backpressure
3. Pneumatic brake compressor pressure doubles automatically, eliminating brake fade
4. Tire friction against asphalt increases, allowing higher curve cornering speeds