A horizontal curve is to be designed for a section of an expressway having a design speed of 100 km/h. Determine:1. The radius of the curve if the superelevation is 5% and side friction is 0.12;2. The minimum superelevation if the speed is 120 km/h, using the same radius that you calculated before, use .side friction = 0.1 %3D

A horizontal curve is to be designed for a section of an expressway having a design speed of 100 km/h. Determine:1. The radius of the curve if the superelevation is 5% and side friction is 0.12;2. The minimum superelevation if the speed is 120 km/h, using the same radius that you calculated before, use .side friction = 0.1 %3D

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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You've been asked to design a vertical curve for an expressway that joins a +4% grade with a -2% grade. The design speed for this expressway is 50 mi/h, the perception- reaction timet= 2.5 sec, and the deceleration rate for braking a = 11.2 ft/sec. What is the minimum length of curve for this section if SSD
A vehicle traverses a superelevated curve at 52 kph. If the radius of the curve is 64 meters, and the coefficient of friction is equal to 0.3, calculate the angle of superelevation (θ) as measured from the horizontal.
Highway Engineering
The deflection angle between two tangents is 95 degrees. Calculate the minimum radius (meters) that would be acceptable for a curve connecting these two tangents, assuming a Design Speed of 110km/hr and corresponding fmax of 0.12. Note: Your answer should be provided to ONE decimal place.
b. A valley (sag) curve is formed by a descending gradient of 1 in 50 which meets an ascending gradient of 1 in 40. Design the total length of the valley curve, if the design speed is 80 km/h. so as to fulfill both comfort condition and head light distance for night driving, after calculating SSD required. Assuming that the coefficient of friction between the tyres and the pavement is 0.30 and perception-reaction time is 2.5 seconds.
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A vertical curve is formed on a two lane undivided highway between the tangents of 1 gradient + 1 Assume the height of driver's eye and height of obstruction and 100 50 as 1.4 m and 0.18 m respectively. Determine the length of vertical curve so formed considering stopping sight distance calculated using the following parameters. Design speed of vehicle = 80 kmph Reaction time = 2.5 sec Down gradient = 2.5% Coefficient of longitudinal friction = 0.38
Question 14 A blind horizontal curve has a length equivalent to 54 meters. If the the design sight distance is equivalent to 67 meters, and the middle ordinate is equivalent to 8.2 meters, Calculate the minimum radius of the curve so it can be classified SAFE. • Question 16 A vehicle traverses a superelevated curve at 52 kph. If the radius of the curve is 64 meters, and the coefficient of friction is equal to 0.3, calculate the angle of superelevation (0) as measured from the horizontal.