A two-lane minor road intersects a two-lane major road at 90° forming a four-leg intersection with trafﬁc on the minor road controlled by a yield sign. A building is located 125 ft from the centerline of the outside lane of the major road and 35 ft from the centerline of the nearest lane of the minor road. Determine the maximum speed that can be allowed on the minor road if the speed limit on the major road is 45 mi/h.

A two-lane minor road intersects a two-lane major road at 90° forming a four-leg intersection with trafﬁc on the minor road controlled by a yield sign. A building is located 125 ft from the centerline of the outside lane of the major road and 35 ft from the centerline of the nearest lane of the minor road. Determine the maximum speed that can be allowed on the minor road if the speed limit on the major road is 45 mi/h.

Traffic and Highway Engineering

5th Edition

ISBN:9781305156241

Author:Garber, Nicholas J.

Publisher:Garber, Nicholas J.

Chapter7: Intersection Design

Section: Chapter Questions

Problem 16P

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A two-lane minor road intersects a two-lane major road at 90° forming a four-leg intersection with traffic on the minor road controlled by a yield sign. A building is located 125 ft from the centerline of the outside lane of the major road and 35 ft from the centerline of the nearest lane of the minor road. a) Determine the maximum speed that can be allowed on the minor road if the speed limit on the major road is 45 mi/h. b) If the speed limit on the major road were 40 mi/h, determine the minimum distance that the building can be located from the centerline of the outside lane of the major street.
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Q3: 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.
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).
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Q2/ A 3200 ft segment of 3.25-mi four-lane undivided multilane highway in a suburban area is at a 1.5% grade. The highway is in level terrain, and lane widths are 11 ft. The measured free-flow speed is 46.0 mi/h. The peak-hour volume is 1900 veh/h, PHF is 0.90, and there are 13% trucks and 2% RVs. Determine the LO, speed, and density.
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.
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