Engineering Homework Help

Consider a segment of highway composed by a horizontal curve and a sag curve(equal–tangent). Both curves have the same design speed. The horizontal curve hasa superelevation =0.08, central angle of Δ=30°, and a PT atstation ( )=302+20. Theroad has two 11–ft lanes (one in each direction).For the sag curve,the initial grade is 1=−1.8%and the final grade is 2>0.0%(the exact value of 2is unknown). The station of the PVC is ( )=232+70, and thestation of the low point of the sag vertical curve is ( )=235+14.8.