Vertical Alignment. VPT of an equal tangent vertical curve is at Station 100 + 00 at an elevation of 320 feet with a grade of minus 4 percent. The curve provides for an overpass across railroad tracks from Station 85 + 70 to 86 + 30. (The maximum of the curve will occur at 86 + 00). The bridge and road are being reconstructed to provide for an increase of track clearance to allow for electrification of a high-speed train. The grade in the area of VPC is 2.5 percent. Find the station and elevation of VPC and the elevation of ihe bridge at 86 + 00 relative to the elevation of VPT.
(a) Find the length of the curve.
(b) the station of VPC.
(c) the elevation at VPC.
(d) the height of the curve at the railroad bridge above the elevation of VPT.
(e) assuming SSD
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