Centrifugal force is primarily a factor on which type of roads?

Centrifugal force is primarily a factor on curved roads because it acts on vehicles as they navigate through a bend. When a vehicle turns, it experiences a force that pushes it away from the center of the curve. This force is known as centrifugal force, and it becomes significant as the radius of the curve decreases—meaning tighter curves have a greater impact.

Curved roads require the driver to manage the vehicle's speed and steering to counteract this outward force to prevent losing control or skidding. Proper banking of the road can help reduce the effects of centrifugal force by allowing vehicles to maintain a stable path around the curve.

In contrast, straight roads do not present the same challenges related to centrifugal force since the vehicle is not turning, and any lateral forces are significantly minimized. Highway intersections may involve turning, but they are not inherently categories of road curvature as they can vary widely in design. Uneven terrain is more about the vertical alignment of the road and doesn’t specifically relate to the concept of centrifugal force in the same way that curves do.