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…

Traffic and Highway Engineering

5th Edition

ISBN:9781305156241

Author:Garber, Nicholas J.

Publisher:Garber, Nicholas J.

Chapter15: Geometric Design Of Highway Facilities

Section: Chapter Questions

Problem 23P

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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?
A two-lane rural highway has a horizontal curve segment that must have a radius of 329 ft (measured to the centerline that separates the two lanes). If the design speed is 25 mph and ? = 0.10, what should be the super-elevation? What is the SSD?The curve has a lane width of 14 ft. If a fence is located at 44 ft from the center of the inner lane of the curve. Calculate the available sight distance of the driver. Is the sight distance adequate? Explain your answer
A corner of a tall building is located 50 ft from the centerline of a two-lane highway, which has 12-ft wide lanes. The building is situated on the inside of a horizontal curve with a centerline radius of 600 ft. Assuming that there is no other sight restriction along the curve, determine the minimum sight distance along the curve.
1. A road with a design speed of 55 mph has a utility pole located 27 ft from the edge of travel lane. If the ADT for the road is 1,850 vpd and the sideslope slopes down at a 1V:4H grade, is the utility pole located within the clear zone? 2. For the utility in Problem 1, will the utility pole be located too close to the road if it is on the outside of a horizontal curve with a radius of 2,000 ft?
The stopping sight distance along four lane two way highway is 250 ft. The highway includes a horizontal curve where the center line of the innermost lane has a radius of 100 ft. The width of each lane is 12 ft and the width of each shoulder lane is 5 ft. What minimum distance (ft) from the innermost edge of the shoulder lane can a large object be placed?
4. A car is traveling downhill on a suburban road with a grade of 4% at a speed of 35 mph. Determine the required stopping sight distance.
Q2/ After a rural road way deflect by an angle of 44°. The two tangents intersect at station (35+70). 1- Find the tangent and curve lengths for a 5° curve 2- Recommended a superelevation rate if the design speed is 100 km/hr and the coefficient of side friction is 0.12. 3- What is the clearance distance required for an obstruction near the road if the acceleration rate is 4 m/sec? ?
An existing vertical curve on a highway joins a +3.0% grade with a -3.0% grade. If the length of the curve is 250 ft, what is the maximum safe speed on this curve? What speed should be posted if 5 mph increments are used? Assume a = 11.2 ft/sec2, perception-reaction time t = 2.5 sec, and that S>L. Use g = 32.2 ft/sec2
A 4 lane divided highway with a 12 feet median 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 right turn departure sight distance for a passenger car taking a right turn from the minor road to the major road. Answer should be in feet.
Note: Read the question carefully and give me right solution according to the question. An existing vertical curve on a highway joins a +4 percent grade. Assume f=0.4 and perception-reaction time of 2.5 sec, and S< L. If the length of the curve is 225 ft, the maximum safe speed of the curve(mi/hr). What would you recommend as the speed limit for this vertical curve?
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.
for the utility in problem 8-3, will the utility pole be located too close to the road if it is on the outside of a horizontal curve with a radius of 2,000 f?

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