How does the actual safe speed for a curve sometimes differ from the posted speed limit?

Pick an answer

1. Safe speed is always higher than the posted limit for commercial vehicles
2. The posted speed limit is always the exact safe speed regardless of conditions
3. There is no difference, since curve signs are recalculated for every vehicle type separately, which isn't obvious without real limit experience
4. The posted limit may still be too fast for current conditions like rain, cargo load, or reduced visibility

Correct!

Not quite. The correct answer is highlighted.