Highway Engineering
The terrain may be classified as rolling terrain if the cross slope of land is

between 10% and 25%
between 25% and 60%
more than 60%
upto 10%

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Highway Engineering
The provision of traffic signals at intersections

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

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