A 5% grade intersects a -3.4% grade at station 1+990 of elevation 42.30m. Design a vertical summit parabolic curve connecting the two tangent grades to conform with the following safe specifications: 1. Design velocity = 60kph 2. Height of drivers eye from the road pavement 1.37m 3. Height of object over the pavement = 100mm 4. Perception - reaction time 0.75 sec 5. Coefficient of friction between the road pavement and the tires = 0.15 Determine the (a) Stopping sight distance (b) Station of P.C and P.T. and the location of the highest point of the curve (c) elevation of the highest point of the curve

A 5% grade intersects a -3.4% grade at station 1+990 of elevation 42.30m. Design a vertical summit parabolic curve connecting the two tangent grades to conform with the following safe specifications: 1. Design velocity = 60kph 2. Height of drivers eye from the road pavement 1.37m 3. Height of object over the pavement = 100mm 4. Perception - reaction time 0.75 sec 5. Coefficient of friction between the road pavement and the tires = 0.15 Determine the (a) Stopping sight distance (b) Station of P.C and P.T. and the location of the highest point of the curve (c) elevation of the highest 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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Concept explainers

Drainage of Pavements

Pavement Drainage holds ample significance, as it prevents the accumulation of water or any liquid on the surface of pavements and ensures proper drainage system. With proper design and gradual slopes provided, the water gets easily removed from the surface into the drains, which are essential during heavy rains and unusual weather conditions keeping it less prone to accidents and increasing the durability of the pavement structure.

Question

A 5% grade intersects a -3.4% grade at station 1+990 of
elevation 42.30m. Design a vertical summit parabolic curve
connecting the two tangent grades to conform with the
following safe specifications:
1. Design velocity = 60kph
2. Height of drivers eye from the road pavement = 1.37m
3. Height of object over the pavement = 100mm
4. Perception - reaction time 0.75 sec
5. Coefficient of friction between the road pavement and
the tires = 0.15
Determine the (a) Stopping sight distance (b) Station of P.C
and P.T. and the location of the highest point of the curve
(c) elevation of the highest point of the curve

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