A vertical curve is to be designed to connect a
-4%
grade to a
1%
grade on a facility with a design speed of
70mih
. For cconomic reasons, a minimum-length curve will be provided. A driver-reaction time of 2.5 seconds maybe used is sight distance determinations. The V.P.L. of the curve is at station 5,100 22 and has an elevation of 1,285 fi. Find the station and elevation of the V.P.C and V.P.T., the high point of the curve, and at 100 -ft intervals along the curve.

Question

A vertical curve is to be designed to connect a

-4%

grade to a

1%

grade on a facility with a design speed of

70mih

. For cconomic reasons, a minimum-length curve will be provided. A driver-reaction time of 2.5 seconds maybe used is sight distance determinations. The V.P.L. of the curve is at station 5,100 22 and has an elevation of 1,285 fi. Find the station and elevation of the V.P.C and V.P.T., the high point of the curve, and at 100 -ft intervals along the curve.

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