Question #$5$:

A vehicle performance is being tested on a large flat are. At this situation:

a$)$ What coefficient of side friction must be developed at a speed of $90k\frac{m}{h}r$ and a degree of curvature $=8$ degrees?

b$)$ What is the sharpest curve $($stated in degrees$)$ that the vehicle traveling at $75k\frac{m}{h}r$ can travel if the coefficient of side friction is $0\mathrm{.}15?$

c$)$ Find the number of lanes and draw a neat cross section for the suggested road showing the utilities location;