Final answer:
The speed limits set for special conditions such as sharp curves are based on the ideal speed, which is the maximum safe speed at which a vehicle can turn on a curve without the aid of friction between the tire and the road.
Step-by-step explanation:
The speed limits set for special conditions such as sharp curves are based on the ideal speed.
Ideal speed refers to the maximum safe speed at which a vehicle can turn on a curve without the aid of friction between the tire and the road.
These speed limits take into account factors like the curvature and banking of the curve and aim to ensure the safety of drivers.