The sag vertical curve has a back tangent grade of -3% and a forward tangent of +2% is to be designed on the basis of a headlight sight distance of a car travelling along the curve equals the minimum safe stopping distance with following specifications: Design Velocity = 120kph Perception-Reaction Time = 0.75 sec Side Friction = 0.15 (a) Compute the sight distance. (b) If the head lamps are 0.75m above the road surface and their beams tilt upward at an angle of 1-degree above the longitudinal axis calculate the length of the curve. (c) If the station of P.C. is 10+540 and elevation 156.5m Find the elevation of the lowest point

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
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The sag vertical curve has a back tangent grade of -3% and a
forward tangent of +2% is to be designed on the basis of a
headlight sight distance of a car travelling along the curve
equals the minimum safe stopping distance with following
specifications:
Design Velocity = 120kph
Perception-Reaction Time = 0.75 sec
Side Friction = 0.15
(a) Compute the sight distance. (b) If the head lamps are
0.75m above the road surface and their beams tilt upward at
an angle of 1-degree above the longitudinal axis calculate the
length of the curve. (c) If the station of P.C. is 10+540 and
elevation 156.5m Find the elevation of the lowest point
Transcribed Image Text:The sag vertical curve has a back tangent grade of -3% and a forward tangent of +2% is to be designed on the basis of a headlight sight distance of a car travelling along the curve equals the minimum safe stopping distance with following specifications: Design Velocity = 120kph Perception-Reaction Time = 0.75 sec Side Friction = 0.15 (a) Compute the sight distance. (b) If the head lamps are 0.75m above the road surface and their beams tilt upward at an angle of 1-degree above the longitudinal axis calculate the length of the curve. (c) If the station of P.C. is 10+540 and elevation 156.5m Find the elevation of the lowest point
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