A vertical parabolic curve is to be used under a grade separation structure. The minus grade left to right is 4%, and the plus grade is 3%. The intersection of two grades is at 435 m and at an elevation of 251.48 m. The curve passes through its fixed point at a chainage of 460 m and RL. of 260 m. Find the length of curve. State the criteria which should be considered in setting minimum length of sag vertical curve on highways.

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Drainage of Pavements

Pavement Drainage holds ample significance, as it prevents the accumulation of water or any liquid on the surface of pavements and ensures proper drainage system. With proper design and gradual slopes provided, the water gets easily removed from the surface into the drains, which are essential during heavy rains and unusual weather conditions keeping it less prone to accidents and increasing the durability of the pavement structure.