Two grade$-$separated highways intersect at right angle as shown in the horizontal alignment below. A single$-$lane ramp is to be constructed to allow eastbound traffic to go southbound. A single horizontal curve, with a central angle of $90$ degrees, is to be used as the ramp.

$ST$: $0+700$

VerticalAlignment

Given,

Design speed $(V)=100k\frac{m}{h}r$

Required superelevation $=5\%$

Coefficient of side friction $=0\mathrm{.}13$

The curve begins at station $0+700$

The elevation of north$-$south highway is $100$ m

Clearance between the highways is $12\mathrm{.}0$ m