Question

A symmetrical parabolic curve has a descending grade of -0.80% which meets an ascending grade of +0.40% at sta

10+020 having an elevation of 240.62 m. The maximum allowable change of grade per 20-m station is 0.15%

1. Determine the length of the parabolic curve.

2. Determine the stationing of the lowest point on the curve

3. Determine the elevation of the lowest point on the curve.

Answer 1

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