A driver is approaching a curve and notices a sign indicating the recommended speed is 35 mph. The driver is operating a loaded tractor-trailer. What should the driver do?

1. Enter the curve at 35 mph since that is the posted speed
2. Slow down to well below the posted speed because the posted speed is for cars, and a loaded truck has a higher center of gravity
3. Speed up before the curve to maintain momentum through it
4. Apply the brakes firmly while in the curve