5. A horizontal curve on a two-lane highway (11 ft lanes) has acentral angle of 33 degrees and is designed for 60mi/h with a 8%Superelevationa) If the PI is at station 300+00, what is the station of the PT and howmany feet have to be cleared from the inside lane's lane-shoulder edge to provide adequate stopping sight distance?b) If the normal component of centripetal force was considered,how much shorter would the radius of the curve be?

The given data is shown below: Central angle,α=33°Design speed, V=60 mi/hrSuper elevation, e=0.08PI…

Answered: 5. A horizontal curve on a two-lane…

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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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.
A simple horizontal curve has 35 degrees of curvature and subtends an angle of 110 degrees. If the PC is at station 3 + 65.00 ft, what is the last deflection angle (degrees) (i.e. the angle subtended by the roadway between the last full station and the PT)?
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
The design speed of a horizontal curve on a two-lane freeway is 70 mph. The central angle is 40 degree and the lane width is 11 ft. The superelevation is 6 and was set assuming maximum friction factor, what distance (in ft) must be cleared from the inside edge of the most inside lane to provide adequate stopping sight distance? A. Other B. 27 C. 42 D. 33
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.
An equal-tangent vertical curve connects a +3.2 % and a -1.1 % grade. The PVI is at station 100+20 and elevation 950 ft and the PVT is at station 105+20. Answer the following 5 questions Question 3 to Question 7. The station of the PVC is at: sta 93+20 sta 95+20 sta 97+20 sta 99+20 sta 105+20
Determine variables requested below for a horizontal curve with the following characteristics. Length of curve 1255', Radius 1200', sta of PC 12+00 superelevation rotated about the roadway centerline, 3 lane roadway, 14ft lane width, entire road section normal crown=2%, road design speed3D60 mph, max superelevation=8%. 9) The difference in elevation of LEP and REP at NC, in ft, is: O 0.42 O 1.68 O 2.52 O 3.36
4. Horizontal Curve: P.C. 12+00.00 P.I T 4= 30° P.T. This highway has a 60 mph speed limit requiring a minimum radius for any curve to be 1500'. If the curve is to begin at Station 12+00.00 and is to have a radius of 1610.10', how long will the curve be? At what station will the PI and PT go? How long will E be? (Answers should all be in hundredths.)
A section of a two-lane highway (one lane in each direction) (12-ft lanes) is designed for 55 mi/h. At one point a vertical curve connects a -2.9% and +1.8% grade. The PVT of this curve is at station 38 + 50. It is known that a horizontal curve starts (has PC) 247 ft before the vertical curve's PVC. If the superelevation of the horizontal curve is 0.08 and the central angle is 39 degrees, what is the station of the PT (express station in the format 0.00, for example, station 10+50 must be expressed as 10.5)?
A section of a two-lane rural highway consists of a -3% grade intersecting a +4.5% grade. The speed limit on the highway is 55 mph. The height of headlights of an average car is 2.4 feet with a beam angle of 1.50. Determine the length of sag vertical curve that joins the two grades, considering a safe stopping maneuver

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