Answered: station 15 + 100 at an elevation of…

station 15 + 100 at an elevation of 72.344 m. If the required rate of change of grade for the parabolic curve to be fitted between those two roads is 0.4% per 20 m stations, determine

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

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Concept explainers

Curve setting

A curve is a turn that is provided horizontally or vertically in the design of highways, railways, and runways. A curve connects two straight lines that are separated by the deflection angle. It helps to change the direction and alignment of the highways, railway tracks, and runways. Therefore, the gradual change in their alignment is made by using a curve to provide comfort to the passengers and this also provides an easy turn to change the direction of the moving vehicle.

Question

Two roads with grades of +4.5% and -3% meet at station 15 + 100 at an elevation of 72.344 m. If the required rate of change of grade for the parabolic curve to be fitted between those two roads is 0.4% per 20 m stations, determine the following: a . Elevation at a point Q that has a distance of 15 m from PI

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Two roads with grades of +4.5% and -3% meet at station 15 + 100 at an elevationof 72.344 m. If the required rate of change of grade for the parabolic curve to befitted between those two roads is 0.4% per 20 m stations. Find the elevation at a point Q that has a distance of 15 m from PI.
PI sta = 18+00, PI elev = 300.00, L = 20 stations, incoming grade = +2%, outgoing grade = -3% The high point of the curve is at station ? Note: I need right solution.. Don't copy from other expert solution.