2. Two tangents meet at a station of 3+100 at a deflection angle of 30°50'15". The two-lane road is designed for a speed of 100 KPH with allowable super-elevation rate of 8% and side friction coefficient of 0.12.

a. Find the radius of the circular curve and compare it with ERA minimum radius provision. Which radius should you use for the rest of your design?

b. Locate the stations at which the curve begins and ends.

c. Find the appropriate curve widening value if the distance between the front and the rear wheel of the most frequently used vehicle on the road is 6m.