Highway Engineering
The maximum number of vehicles beyond which the rotary may not function efficiently is

500 vehicles per day
500 vehicles per hour
5000 vehicles per day
5000 vehicles per hour

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Highway Engineering
The provision of traffic signals at intersections

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

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