A large grain elevator is located 40 feet from the centerline of a two-lane highway (55 mph speedlimit, 12-ft lanes and level terrain). The elevator is situated on the inside of a horizontal curvewith a radius of 500 feet measured to the centerline of the highway. Assuming that the elevatoris the only sight restriction on the curve, what is the available sight distance along the curve(measured to the center of the inside lane)? Does adequate stopping sight distance exist?

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Answered: A large grain elevator is located 40…

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 driver will exit from a major road to enter a minor road via a ramp. From a distance of d1, he sees the EXIT sign located at d2 m before the exit RAMP (designed as a circular curve). He has to slow down to enter the RAMP safely while moving over the distance of (d1 + d2) on a 2-percent downgrade. He can read a road sign at a distance of 15 m for each 30 mm of the letter height. He will move along the ramp on a 3% downgrade and come to a complete stop at the STOP sign to enter the minor road as shown in the following figure:
A single-lane off ramp has a radius of curvature of 1,500 ft. The ramp connects two freeways that are perpendicular (i.e., a total of 90° turn). Brush and other visual obstructions are cleared to 25 ft from the centerline of the off ramp. Assume a driver reaction time of 2.5 seconds. (a) What is the stopping sight distance for this curve? (b) What speed limit should be posted for this ramp? (c) What superelevation is required for this curve to be safe to navigate?
Determine the minimum sight distance for a two-lane divided Highway in hilly terrain on a 4% descending grade. data as per IRC recommendations given are V=60kmph, f=0.36, t=2.5sec.
Determine the grades of a symmetric VC that requires a stopping sight distance of 434.3 ft and minimum length of VC 873.9 ft. Determine also the maximum speed limit to be imposed if it is to be by increments of 5 mi/hr and 10 mi/hr. Assume vehicle eye levels of 3.5’ and 2.0’, both situated inside the VC. Use the same deceleration value in the previous problem.
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 curve of radius 250 ft and e 0.08 is located at a section of an existing rural highway, which restricts the safe speed at this section of the highway to 50% of the design speed. This drastic reduction of safe speed resulted in a high crash rate at this section. To reduce the crash rate, a new alignment is to be designed with a horizontal curve. Determine the minimum radius of this curve if the safe speed should be increased to the design speed of the highway. Assume fs= 0.17 for the existing curve, and the new curve is to be designed with e = 0.08
A major roadway with a speed limit of 35 mi/h has an intersection that has no intersection control with a minor roadway at a right angle. A building is located next to the intersection at a distance of 50 ft from the center of the near lane on the major roadway and 40 ft from the center of the near lane on the minor roadway. At what speed for the minor roadway is the intersection safe? Grades are approximately level.
A horizontal curve is being designed to connect two tangents that intersect on a rural collector road with a specified design volume of 2500 veh/day (i.c. design speed 60 mph). It is expected that, because of right-of-way restriction, a large billboard will be placed at a distance of 50 ft from the centerline of the inside lane. If the terrain can be described as level and only a minimal amount of snow is expected on the road, determine the minimum radius of curve. Assume maximum superelevation rate (e) of 0.1 and fs=0.12. Ans: 1090 ft
The design speed of a multilane is 55kph. What is the minimum stopping sight distance that should be provided on the road if the road is level.
A 4-lane divided highway has a highway grade of -1.5%. The minor road approach grade is 3.5%. The design speed is 45 mph for the major road and 40 mph for the minor road. Find the left turn departure sight distance for a passenger car turning left from the minor road to the major road, The answer should be in feet.
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)? Response Feedback: ΔΙ L
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