Highway Engineering
When the path travelled along the road surface is more than the circumferential movement of the wheels due to rotation, then it results in

slipping
turning
skidding
revolving

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Highway Engineering
The provision of traffic signals at intersections

increases right angled and rear end collisions
reduces rear end collisions but may increase right angled collisions
reduces right angled and rear end collisions
reduces right angled collisions but may increase rear end collisions

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