What Is an Unbanked Turn

Unbanked Curves. An unbanked curve is simply a curve (or a turn) that lies flat on the ground (parallel to the horizontal). Whenever a car travels along such a curve, there is a force of friction that acts on the car to keep it turning in a circular pathway.

What is the design speed for a car traveling around an unbanked turn?

The maximum velocity for the car is about 12 m/s.

At what maximum speed can a car safely negotiate a horizontal unbanked turn?

Car A uses tires for which the coefficient of static friction is 1.1 on a particular unbanked curve. The maximum speed at which the car can negotiate this curve is 25 m/s.