11. Two vertical parabolic curves have been connected to form a roadway by three gradients: -5.30 %, 4.10 % and -3.70 % respectively. If the length of the second curve is half the length of the first curve, compute the following: d. The total length of the roadway in km if a bridge structure were to be located within the first curve, with a required clearance height of 6.25 m, then assuming a driver's eye height of 3.4 m and an object height of 0.31 m if the design speed is 130 kph. |'

11. Two vertical parabolic curves have been connected to form a roadway by three gradients: -5.30 %, 4.10 % and -3.70 % respectively. If the length of the second curve is half the length of the first curve, compute the following: d. The total length of the roadway in km if a bridge structure were to be located within the first curve, with a required clearance height of 6.25 m, then assuming a driver's eye height of 3.4 m and an object height of 0.31 m if the design speed is 130 kph. |'

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

Design a length of vertical curve for a sag curve based on 1. Comfort Ride 2. Headlight Sight Distance Design Speed = 40 mph SSD = 305 g1 = -3.2% g2 = +2.4%
A vertical curve (with EQUAL tangent lengths) is to connect a +1.35% gradient to a -2.25% gradient on a highway designed for a speed of 80 kmph. The K value for the highway is 55 and the minimum required length is to be used. The reduced level and through chainage of the intersection point of the gradients are 78.34 metres and 667.49 metres respectively. i) ii) Calculate the reduced levels and the chainages of the tangent points. Calculate the reduced levels at exact 25 metre multiples of through chainage along the curve. ii) Calculate the through chainage and the reduced level of the highest point on the curve.
An equal-tangent vertical curve is designed for the year 2030 for a design speed of 70 mi/h to connect grades G1 = 1.2% and G2 = - 2.1%. In 2030, vehicles have become smaller so that the driver's eye height is assumed to be 3.0 ft above the pavement and roadway objects are assumed to be 1.0 ft above the pavement surface. Compute the design curve length for the year 2030. A. 1178.02 В. 1032.09 C. 974.12 D. 980.25
A horizontal curve has 2 lanes per direction. The radius, measured to the center marking that separates the two opposing directions is 700 ft. The lane width is 14 ft. The wall of the tunnel is 10 ft from the right edge of the right travel lane. Calculate S. If vehicle A traveling at 50 mph on the right lane has just passed the PC, and vehicle B is stopped in the middle of the right lane at PT, can vehicle A stop before colliding with vehicle B? Explain your answer.
A highway curve having a radius of 120m has an angle of embankment equal to 9.31°. A car has a weight of 15 KN and center of gravity is located 0.80m above the roadway. Distance between front wheels is 1.2m if friction is great enough to prevent skidding, at what speed would overturning impend?
A vertical parabolic sag curve is to be designed to connect a down-gradient of 1 in 20 with an up-gradient of 1 in 15, the chainage and reduced level of the intersection point of the two gradients being 797.7 m and 83.544 m respectively. In order to allow for necessary headroom, the reduced level of the curve at chainage 788.7 m on the down-gradient side of the intersection point is to be 85.044 m
A two-lane highway (one 3.6 m lane in each direction) goes from normal crown with 2% cross-slopes to 10% superelevation by means of a spiral transition curve. Determine the minimum length of the transition if the difference in grade between the centerline and edge of traveled way is limited to1:200.Round up to the next largest 20m interval.(b) Draw the superelevation diagram for the transition described in part a ,The station of the TS is 160+00
A vertical curve is formed at the intersection of an ascending gradient of 2.5% and a descending gradient of 4.5%. If the rate of change of gradient is 1% for 150 m length, then the length of the vertical curve to be adopted is
A vertical curve was designed in 2006 for SSD requirements at a design speed of 120 km/h to connect grades G1 = +1% and G2 = -2%. The curve is to be redesigned for 120 km/h design speed in the year 2050. Vehicle braking technology has advanced such that vehicle deceleration rate has increased by 40% relative to 3.4m/s2 value used in the original design. However, due to the higher percentage of older people in the driving population, design reaction times have increased by 20%. Also, because vehicles have become smaller, the driver’s eye height is assumed to be 0.9 m above pavement. Compute the difference in design curve lengths for the 2006 and 2050 designs. Assume heye =1.08 and hobs = 0.60 m.
Quick...