As spring approaches, your design firm has been tasked with designing a two-lane highway in rural Wyoming. The highway descends a hill, crosses a river, and must shift to a parallel alignment on level terrain. You must design the vertical alignment, horizontal alignment, and the flexible pavement. Top-view and profile diagrams are on the next page, and more details are as follows: The river crossing must occur where indicated in the diagram. For right-of-way reasons, the horizontal alignment must be straight until station 140 00, and the transition to the new alignment must be completed within 3000 ft (measured along the original alignment, as shown in the figure on the next page.) The natural terrain is level at elevation 7100 ft until station 100 00. Between station 100 00 and 120 00, the elevation of the terrain bears a striking resemblance to the curve 7050 50 cos(x/2000), where x is the distance past station 100 00 in feet. From station 120 00 onward, the terrain is level at 7000 ft. If you can, design the alignment to be safe when traveled at 65 mph; however, you may lower the design speed for short sections if necessary. If