Highway Curves - Questions

1. Use the following diagram:

a) At what station is the low point located?
b) At what elevation is the low point?
c) At what elevation is the sta 21+75.05
d) What is the highest design speed for the curve?
e) What is the rate of grade change per station?
f) If 18 ft of clearance is required, what is the lowest elevation that the bottom of an overhead bredige deck may have at sta 22+75

2. The grades on a vertical curve intersect at station 110+00 and elevation 352 ft. A drain grating exists at sta 110+00 at elevation 360.25 ft

a) Given a curve length of 1800 ft, what is the elevation of BVC?
b) Given a curve length of 1800 ft, what is the elevation of sta 111+40?
c) Given a curve length of 1800 ft, what is the elevation of the low point?
d) Given a curve length of 1800 ft, what is the station of BVC?
e) Given a curve length of 1800 ft, what is the elevation of EVC?

3.
The tangent of the horizontal curve shown is relocated 12 ft west of its original position. The PC remains the same.
a) What is the original curve radius?
b) What is the new curve radius?