The two$-$lane rural roadway shown below has two$-$way traffic and sharp geometric restrictions. As a result, you need to determine the best superelevation distribution for the condition shown If lane Widths are $12-$feet, the design speed is $40mph,$ and the maximum allowable superelevation is $8\%.$

A$.$ What is the bearing from point A to point $B?$

B$.$ What is the bearing from point $E$ to point F$?$

C$.$ Does the bullding shown encroach on the driver's line of sight from the beginning to the end of the curve at curve #$2$ if the driver is in a vehicle in the inside lane? $($You can assume that the buliding is located at the center of the curve and is positioned $20$ feet from the edge of the lane as shown.$)$

D$.$ For Curve #$1,$ find the critical superelevation stations $($begin transition for the left & right side of the road cross$-$section, $0\%,$ full superelevation$)$ as you enter the curve.

E$.$ What is the minimum tangent length $($for adequate superelevation transition$)$ between Curve #$1$ and Curve #$2?$

F$.$ Based on the minimum tangent section computed in part E above, what would be the P$.$C$.$ Station

for Curve #$2?$

G$.$ Explain what would be different if spiral curves were utilized? Where would they be positioned

and why would they be used? You may wish to draw a plcture to help explain your answer.

H$.$ If at the time of dealgn you are informed that this road will ultimately be widened to a $4-$lane road,

what would be your minimum tangent length to accommodate current construction and the future Improvement? How does thls value compare to your tangent length in part E$?$