A sag vertical curve is to be designed to join a -1.75 grade to a 3.00% grade. Assuming a deceleration rate of 11.2%2, perception reaction time of 2.5 seconds, and design speed of 70 mph, calculate the minimum that will satisfy the headlight criteria

A sag vertical curve is to be designed to join a -1.75 grade to a 3.00% grade. Assuming a deceleration rate of 11.2%2, perception reaction time of 2.5 seconds, and design speed of 70 mph, calculate the minimum that will satisfy the headlight criteria

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 19P

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Question 7:
A sag vertical curve is to be designed to join a -1.75 grade to a 3.00% grade. Assuming a deceleration rate of
11.2%2 , perception reaction time of 2.5 seconds, and design speed of 70 mph, calculate the minimum
length of the curve that will satisfy the headlight criteria.

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