A 4.5 % grade intersects a - 2.6% grade at station 1 +990 of elevation 42.30 m. Design a vertical summit parabolic curve connecting the two tangent grades to conform with the following safe stopping sight distance specifications. Design velocity = 56 kph Height of driver's eye from the pavement = 1.37m Height of an object over the pavement ahead. 100 mm Perception-Reaction time = 3/4 seconds f = 0.13 Determine the length of the curve in m.
A 4.5 % grade intersects a - 2.6% grade at station 1 +990 of elevation 42.30 m. Design a vertical summit parabolic curve connecting the two tangent grades to conform with the following safe stopping sight distance specifications. Design velocity = 56 kph Height of driver's eye from the pavement = 1.37m Height of an object over the pavement ahead. 100 mm Perception-Reaction time = 3/4 seconds f = 0.13 Determine the length of the curve in m.
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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