Highway Engineering
In CBR test the value of CBR is calculated at

7.5 mm penetration only
2.5 mm penetration only
5.0 mm penetration only
both 2.5 mm and 5.0 mm penetrations

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Highway Engineering
The provision of traffic signals at intersections

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

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