Calculate: (i) The reduced levels of the tangent points (ii) The reduced levels along the curve at exact 30 m multiples of through chainage (iii) The through chainage and reduced level of the highest point on the curve

Traffic and Highway Engineering
5th Edition
ISBN:9781305156241
Author:Garber, Nicholas J.
Publisher:Garber, Nicholas J.
Chapter15: Geometric Design Of Highway Facilities
Section: Chapter Questions
Problem 21P
Question
A parabolic vertical curve is to connect a +2.3% gradient to a –1.5% gradient on a highway designed for a speed of 85 kph. The K Value for the highway is 55 and the minimum required length is to be used. The reduced level and the through chainage of the intersection point of the gradients are 94.18 m and 889.82 m, respectively, and in order to meet site conditions, the verticalcurve is to have unequal tangent lengths such thatthe through chainage of the exit tangent point must be 976.54 m. Calculate: (i) The reduced levels of the tangent points (ii) The reduced levels along the curve at exact 30 m multiples of through chainage (iii) The through chainage and reduced level of the highest point on the curve
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