You are designing a highway to AASHTO guidelines on rolling terrain where the design speed will be 65 mi/h. At one section, a +1.25% grade and a -2.25% grade must be connected with an equal-tangent vertical curve. Determine the SSD given the reaction time of 2.5 sec and deceleration of 3.4 m/s^2. Determine also the minimum length of curve.

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Q: PROBLEM 7 A +2 percent grade on an arterial highway intersects with a -1 percent grade at station…

A: Given- +2% grade-1% gradestationing 535+24.25elevation=300 ftdesgin speed=65 mi/hrelevation of each…

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Q: 3. What is AASHTO's recommended perception reaction time (s)?

A: Reference : AASHTO, American Association of State Highway and Transportation To determine : AASHTO…

Q: Problem 2.  This is a four-part problem. A +2.5% grade intersects with a –1.5% grade at station (735…

A: Note:- Hi! Thank you for the question, As per the honor code, we are allowed to answer three…

Q: There is a need for conducting a design check for a horizontal curve (flat terrain) for an…

A: Design speed (V) = 80 kmph Superelevation provided (e) = 7% or 0.07Radius (R) = 700 m

Q: A sag vertical curve will connect a -1% grade to a 3% grade with a design speed of 50 mph. Using the…

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Q: you

A: Given  V=80kmph L=900 g1=2.0% g2=-1.5%

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Q: There is a need for conducting a design check for a horizontal curve (flat terrain) for an…

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Q: 5. What is the assumed height (ft) of the driver's eye for passenger cars?

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A: Given data, Upgrade % = 6% Reduction in speed = 70 - 45 = 25 mph

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Q: 1. Two vertical parabolic curves have been connected to form a roadway by three gradients: -5.30 %,…

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Q: A curve of radius 250 ft and e = 0.08 is located at a section of an existing rural highway, which…

A: It is required to determine the safe speed. R=v215e+fs Here R is the radius of curve, v is the safe…

Q: Example 3 The design speed of the highway is ranging from 100 - 120KM/h. The initial and final…

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A: Given: Design speed v = 96 kmph  Super elevation e = 5.5% = 0.055 Friction coefficient f = 0.11…

Q: is the minimum length of curve for this section if SSD<L? Use g 3.

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Q: Calculate the minimum length af a crest vertical curve for a two lane highway with an initial grade…

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Intersection Design

An intersection is a location where two or more roads or railways meet or join. The traffic movement is controlled at the intersection that depends on its design and type. It governs the operation, efficiency, speed, capacity, and safety of the highways, airways, and railways. The movement of the pedestrian causes hazards and delays at the intersection.