Traffic And Highway Engineering
5th Edition
ISBN: 9781133605157
Author: Garber, Nicholas J., Hoel, Lester A.
Publisher: Cengage Learning,
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Question
Chapter 8, Problem 2P
To determine
Considerations for Stop control and yield control approach tominor road at the intersection with major road.
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A minor 2-lane roadway with design speed of 45 mph crosses a major 2-lane roadway with design speed of 50 mph at 90 degree angle at an at-grade T-intersection. All lanes are 12 ft wide. If a stop sign is installed on the minor road, determine the dimensions ofallrequired clear sight triangles at this intersection for passenger cars(Case B, stop sign control on the minor road).
A large grain elevator is located 40 feet from the centerline of a two-lane highway (55 mph speed
limit, 12-ft lanes and level terrain). The elevator is situated on the inside of a horizontal curve
with a radius of 500 feet measured to the centerline of the highway. Assuming that the elevator
is 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 minor road intersects a four-lane undivided major road at 90 degrees,forming a four-leg intersection with traffic on the minor road controlled by a stop sign. The designspeed on the major road is 80 km/h. The approach grade on the minor road is 5%. A single unit truckon the minor road would like to make a left turn onto the major road. Using the AASHTO procedure,determine the minimum sight distance required on the major road for the truck to make a left turnonto the major road.
Chapter 8 Solutions
Traffic And Highway Engineering
Ch. 8 - Prob. 1PCh. 8 - Prob. 2PCh. 8 - Prob. 3PCh. 8 - Prob. 4PCh. 8 - Prob. 5PCh. 8 - Prob. 6PCh. 8 - Prob. 7PCh. 8 - Prob. 8PCh. 8 - Prob. 9PCh. 8 - Prob. 10P
Ch. 8 - Prob. 11PCh. 8 - Prob. 12PCh. 8 - Prob. 13PCh. 8 - Prob. 14PCh. 8 - Prob. 15PCh. 8 - Prob. 16PCh. 8 - Prob. 17PCh. 8 - Prob. 18PCh. 8 - Prob. 19PCh. 8 - Prob. 20PCh. 8 - Prob. 21PCh. 8 - Prob. 22PCh. 8 - Prob. 23PCh. 8 - Prob. 24PCh. 8 - Prob. 25PCh. 8 - Prob. 26PCh. 8 - Prob. 27PCh. 8 - Prob. 28P
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- A two-lane minor road intersects with a four-lane major street at 90 deg, forming a 4-leg intersection with traffic on the minor road controlled by a stop sign. The speed limits were 45 mph on the major road, and 25 mph on the minor road. Determine the intersection sight distance (ISD) when a passenger car wants to make a left turn onto the major street. (The grades of both road are low than 3%)arrow_forwardQ3: A four-leg intersection with no traffic control is formed by two-lane roads with the speed limits on the minor and major roads being 15 and 25 mi/h, respectively. If the roads cross at 90° and a building is to be located at a distance of 45 ft from the centerline of the outside lane of the major road, determine the minimum distance at which the building should be located from the centerline of the nearest lane on the minor road so that adequate sight distances are provided.arrow_forwardQUESTION 3 What is the intersection sight distance (ft) needed at a yield controlled intersection for a passenger car to turn left onto a 2- way, 2-lane road with a design speed of 50 mph? [round to the nearest foot]arrow_forward
- A tall building located in Berea is located 13.5 m from the centerline of the right lane of a local road and 19.5 m from the centerline of the right lane of an intersecting road. The approach grade of the intersection is 2% and the lane width is 3m. If the maximum speed limit on the intersecting road is 56 km/h, what should the speed limit on the local road be such that the minimum sight distance is provided to allow the drivers of approaching vehicles to avoid imminent collision by adjusting their speeds?arrow_forwardA signaled intersection can improve the traffic density of a certain road segment. Choices: A. True B. Falsearrow_forwardQUESTION 4 What is the intersection sight distance (ft) needed at a yield controlled intersection for a passenger car to turn right onto a 2- way, 2-lane road with a design speed of 50 mph? [round to the nearest foot]arrow_forward
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- A 2 lane highway with a grade of 6% has a posted speed limit of 50 mph and a design speed of 55mph. The minor road approach grade is -3%. Find the right turn departure sight distances for a passenger car taking a right turn from the minor road to the major road. Answer should be in feet.arrow_forwardUnder what conditions would you recommend the use of each of the following intersection control devices at urban intersections? (Select all that apply.) (a) yield sign at roundabout approaches to control traffic on the approaches a separate or channelized right turn lane without an adequate acceleration lane a minor road when it intersects a major road, at an unsignalized intersection, with approximately equal traffic volumes, and where minimum volume or crash warrants are met a minor road when it intersects a major road, at an unsignalized intersection, with significantly different traffic volumes, and where a combination of high speed, restricted view, and serious crashes indicate the necessity for such a control (b) stop sign at roundabout approaches to control traffic on the approaches a separate or channelized right turn lane without an adequate acceleration lane a minor road when it intersects a major road, at an unsignalized intersection, with approximately equal traffic…arrow_forward3. Drivers must slow from 70 mph to 40 mph to negotiate a severe curve on a rural highway. A warning sign for the curve is visible for 100 ft. How far in advance of the curve is it necessary to post the sign to insure that vehicles are able to properly decelerate? Assume f-0.30, G=0.0% and perception reaction time is 2 sec.arrow_forward
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