Highway Engineering
In highway construction, rolling starts from

Any of the above
One side and proceed to other side
Sides and proceed to center
Center and proceed to sides

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Highway Engineering
The provision of traffic signals at intersections

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

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