a two-lane highway has a posted speed limit of 50 mph and 12 ft lanes. There is a local road overpass the highway. The b

[answerhappygod]

a two-lane highway has a posted speed limit of 50 mph and 12 ft
lanes. There is a local road overpass the highway. The bottom of
the bridge (low member) is level. The low member has an elevation
of 375.70 for the full length and width of the bridge. The length
of vertical curve is 450 ft. Other information is shown in the
figure. a) If the superelevation of the horizontal curve is 8%,
determine its adequacy. b) Calculate the vertical clearance between
the bridge and the vertical curve, and determine its adequacy.