railway DFCCIL Executive 2025 Mock Test Highway Engineering Highway Geometric Design

If g1 and g2 are the two gradients r is the rate of change of grade in % per chain, the length of the vertical curve will be

1
(g1 + g2)/r2
2
(g1 - g2)/r-0.5​
3
(g1 - g2)/r​
4
(g1 + g2) 0.5/r3
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