Question

why do roads on mountain have inward inclination at sharp turns

Answer 1

Here the concert of banking of roads come. when on mountain, a sharp turn comes, there to increase the centripetal force and to keep the body inward, the inclination is given inward

Answer 2

Answer:

When a vehicle moves along a horizontal curved road on a mountain, the necessary centripetal force is supplied by the force of friction between the wheels of the vehicle and the surface of the road.  Thus, to provide necessary centripetal force, mountains have an inward inclination at sharp turns.