Example: For a road, the project speed is given as $80k\frac{m}{h}.$ There are

two vertical grades at a certain section of the road, which are $4\mathrm{.}2\%$ and

$-2\mathrm{.}6\%,$ respectively. Also given; $E_{\frac{V}{P}\text{I}}=372\mathrm{.}00m$;$D_{\frac{V}{P}\text{I}}=12+460m,$

driver reaction time is $1sec.$ and coefficient of friction is $0\mathrm{.}30.$

curve

Find the minimum vertical curve length, considering stopping

sight distance.

Find the grade elevations at every $25m$ starting from the BVC$.$