• Question 17The minimum radius of thecurve is 216 meters, and the value ofcoefficient of friction andsuperelevation combined is equal to0.8. What should be the maximumdesign vehicle speed at the curve inorder for road users to safely traverseit?• Question 18Calculate the designthickness in mm (rounded to thenearest tens) at the edge of a rigidpavement with dowels if the:Allowable tensile strength of concrete= 3.0 MPaWheel load = 117 kN

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Answered: The minimum radius of the curve is 216…

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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1. The stopping sight distance on a curved section of a road is 500 ft. The superelevation of the curve is 4.5%. The current radius of the curve is 900 ft. What should be the design speed on the curve? (Using AASHTO tables)
A car is traveling up a 1.25% grade of a crest curve with a design speed of 65 mph. The descending grade is -2.75%. What is the required length of curve for minimum proper stopping sight distance? AASHTO Minimum Stopping Sight Distances on Level Roadways (based on braking distance) stopping sight distance design speed (mph) braking distance on level (ft) design (ft) (m) brake reaction distance calculated (km/h) (ft) (m) (m) (ft) (m) (20) (30) (40) (50) (60) (70) (80) (90) (100) (110) (120) (130) (13.9) (20.9) (27.8) (34.8) (41.7) (48.7) (55.6) (62.6) (69.5) (76.5) (83.4) (90.4) (4.6) (10.3) (18.4) (28.7) (41.3) (56.2) (73.4) (92.9) (114.7) (138.8) (165.2) (193.8) (18.5) (31.2) (46.2) (63.5) (83.0) (104.9) (129.0) (155.5) (184.2) (215.3) (248.6) (284.2) (20) (35) (50) (65) (85) (105) (130) (160) (185) (220) (250) (285) 15 55.1 21.6 76.7 80 20 73.5 38.4 111.9 115 25 91.9 60.0 151.9 155 30 110.3 86.4 196.7 200 35 128.6 117.6 246.2 250 40 147.0 153.6 300.6 305 359.8 423.8 45 165.4 194.4…
Subject: Transportation engineering Read the question carefully and give me right solution according to the question A horizontal curve on a two-lane highway (12-ft lanes) is designed for 45 mi/h with a 4% superelevation. Considering the minimum radius for horizontal curve, how many feet have to be cleared from the lane’s shoulder edge to provide adequate stopping sight distance?
A vehicle travelling at design speed of 80 kmph on a descending gradient of 2.5% meets on ascending grade of 3%. Calculate the minimum length of vertical curve required (in meters) to facilitate smooth movement of vehicle considering head light sight distance of 100 m and assume that passenger is comfortable is all conditions,
A curve of 100 m radius (e=8.0 % and fs=0.14) is located at a section of an existing rural highway which restricts the safe speed to 55 % of the design speed causing a high accident rate. To reduce the accident rate, a new curve is to be designed. Determine the minimum radius of this curve if the safe speed should be increased to the design speed. Assume the same values of e and fs.
Asap
What will be the ruling radius of a horizontal curve on a National Highway for a design vehicle speed of 100 km/h, assuming allowable super elevation to be 7 % and lateral friction as 0.13 ?
A vehicle travels at a speed of 80km/hr on a straight section of a road. The driver keeps increasing the speed constantly. What is the role of the curves for a vehicle travelling along with one of the straights?

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The minimum radius of the curve is 216 meters, and the value of coefficient of friction and superelevation combined is equal to 0.8. What should be the maximum design vehicle speed at the curve in order for road users to safely traverse it?