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Forces Acting on a Turning Vehicle Centrifugal forces on curves are proportional to the local curvature κ which is the inverse of the radius of curvature. The centrifugal force acts along the outward normal and tends to destabilize a vehicle by tipping it about the outside wheel line. One way to counter this destabilizing effect is to "bank" the roadway. Superelevation is the banking (rotation) of a highway to counter some of the lateral force. In Fig. 405.1, the components of the two body forces—the gravity force and the centrifugal force—are shown as solid lines. As shown in the figure, the banking ca…
Indranil Goswami: Civil Engineering All-In-One PE Exam Guide: Breadth and Depth, Second Edition. Superelevation, Chapter (McGraw-Hill Professional, 2012), AccessEngineering Export