Highway Engineering
The camber of road should be approximately equal to

half the longitudinal gradient
two times the longitudinal gradient
three times the longitudinal gradient
longitudinal gradient

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Highway Engineering
The provision of traffic signals at intersections

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

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