3.5 An equal-tangent crest curve has been designed for 70 mi/h to connect a +2% initial grade and a -1% final grade for a new vehicle that has a 3 ft driver's eye height; the curve was designed to avoid an object that is 1 ft high. Standard practical stopping distance design was used but, unlike current design standards, the vehicle was assumed to make a 0.5g stop, although driver reactions are assumed to be the same as in current highway design standards. If the PVC of the curve is at elevation 848 ft and station 43+ 48, what is the station and elevation of the high point of the curve?

3.5 An equal-tangent crest curve has been designed for 70 mi/h to connect a +2% initial grade and a -1% final grade for a new vehicle that has a 3 ft driver's eye height; the curve was designed to avoid an object that is 1 ft high. Standard practical stopping distance design was used but, unlike current design standards, the vehicle was assumed to make a 0.5g stop, although driver reactions are assumed to be the same as in current highway design standards. If the PVC of the curve is at elevation 848 ft and station 43+ 48, what is the station and elevation of the high point of the curve?

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Question

3.5 An equal-tangent crest curve has been designed for
70 mi/h to connect a +2% initial grade and a -1% final
grade for a new vehicle that has a 3 ft driver's eye
height; the curve was designed to avoid an object that is
1 ft high. Standard practical stopping distance design
was used but, unlike current design standards, the
vehicle was assumed to make a 0.5g stop, although
driver reactions are assumed to be the same as in current
highway design standards. If the PVC of the curve is at
elevation 848 ft and station 43+ 48, what is the station
and elevation of the high point of the curve?

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