A 4-lane divided highway is to be designed to connect two points A and B. One horizontal curve and two vertical curves are adopted to provide the safest and most economical design. Figures 1 and 2 show the plan and elevation of this highway section. The following are the relevant data for the design process: Design Speed = 70mph Maximum superelevation = 0.04 Lane width = 12ft Median width = 12ft Shoulder width = 8 ft Coefficient of friction (1) = 0.12 Side slopes (3:2) in fill sections & (4:1) in cut sections (280+00). 1507 B (360+00) Figure (1): Plan (200+00) B Natural Ground Level 12 ft 1% Highway Construction (230+00) (200+00) (310+00) (360+00) Station Construction Elevation (ft) 320.50 350.50 110.50 310.50 Figure (2): Elevation (Profile) It is required to: 1 4) (10 Marks) Determine the length of the crest vertical curve shown in the given profile if this curve passes through two points X and Y having stations of (220+00) and (236+00) respectively. Their elevations are 340.38 and 339.3 ft respectively. A 4-lane divided highway is to be designed to connect two points A and B. One horizontal curve and two vertical curves are adopted to provide the safest and most economical design. Figures 1 and 2 show the plan and elevation of this highway section. The following are the relevant data for the design process: Design Speed = 70mph Maximum superelevation = 0.04 Lane width = 12ft Median width = 12ft Shoulder width = 8 ft Coefficient of friction (1) = 0.12 Side slopes (3:2) in fill sections & (4:1) in cut sections (280+00). 1507 B (360+00) Figure (1): Plan (200+00) B Natural Ground Level 12 ft 1% Highway Construction (230+00) (200+00) (310+00) (360+00) Station Construction Elevation (ft) 320.50 350.50 110.50 310.50 Figure (2): Elevation (Profile) It is required to: 1 4) (10 Marks) Determine the length of the crest vertical curve shown in the given profile if this curve passes through two points X and Y having stations of (220+00) and (236+00) respectively. Their elevations are 340.38 and 339.3 ft respectively