An arched underpass has the shape of a parabola. A road passing under the arch is 24 feet wide, and the maximum height of the arch is 14.4 feet. How wide must a truck to be able to pass through the underpass with vertical clearance of 10.8 ft?

An arched underpass has the shape of a parabola. A road passing under the arch is 24 feet wide, and the maximum height of the arch is 14.4 feet. How wide must a truck to be able to pass through the underpass with vertical clearance of 10.8 ft?

Traffic and Highway Engineering

5th Edition

ISBN:9781305156241

Author:Garber, Nicholas J.

Publisher:Garber, Nicholas J.

Chapter8: Intersection Control

Section: Chapter Questions

Problem 1P

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Question

An arched underpass has the shape of a parabola. A road passing under the arch is 24 feet wide, and the
maximum height of the arch is 14.4 feet. How wide must a truck to be able to pass through the underpass
with vertical clearance of 10.8 ft?

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