Traffic And Highway Engineering
5th Edition
ISBN: 9781133605157
Author: Garber, Nicholas J., Hoel, Lester A.
Publisher: Cengage Learning,
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Question
Chapter 3, Problem 19P
To determine
Whether the designed location is hazardous or not. And action recommended for hazardous location.
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On a proposed highway, the speed limit is 120 km/hr, radius of a horizontal curve on this proposed highway is 250 m and the superelevetion is 8%. Is there any design problem? If so, what the action will you recommend to correct the design?
3-19
The radius of a horizontal curve on an existing highway was field-measured to be
243 m. The pavement on this two-lane highway is 6.6 m wide, and the elevation difference
between the inside and outside of the curve is 0.43 m. The posted speed limit on the road
is 96 km/h. Is this a hazardous location? If so, why? What action will you recommend to
correct the situation?
The radius of a horizontal curve on an existing highway is 230 m. The superelevation rate at
the curve is 0.08, and the posted speed limit on the road is 100 km/h.
Justify that this is a hazardous location
Provide any two (2) possible actions that you would recommend to correct the situation
i.
ii.
Chapter 3 Solutions
Traffic And Highway Engineering
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- 3. A developer has applied for a construction permit for a building at the southeast corner of an intersection. The intersection is controlled with a stop sign on the minor road. The four-lane major road in the east-west direction has a design speed of 50 mph. The two-lane minor road is controlled by a stop sign. Determine whether the permit should be approved for the following conditions. a. Design vehicle - Single-Unit truck b. Approach grade = 4% C. Maximum feasible distance of the building from the center of the nearest lane of the four-lane road = 21 ft d. Maximum feasible distance of the building from the center of the nearest lane of the two-lane road = 15 ftarrow_forwardA 3.25-mile segment of undivided, four-lane highway is primarily on level terrain. The highway segment does, however, contain one sustained grade of 2.5% that is 3,200 ft long. Other relevant information include: Base free-flow speed = 65 mph %3! 11-ft lanes • 4 ft clearance at the roadside (right side) • 20 access points/mile Peak-hour volume = 1,900 veh/h 13% trucks; 2% RVs • PHF = 0.90 • Familiar facility users At what LOS is the highway expected to operate? (Hint: Three different analyses will be needed: a) the level terrain portion of the highway, b) the 2.5% upgrade portion of the highway, and c) the 2.5% downgrade portion of the highway.)arrow_forwardQUESTION 8 The 3 eastbound lanes of a rural freeway segment have 11 ft lane widths. There is a 3 ft lateral clearance on the right side of the road. There are no ramps within the influence area. What is the estimated FFS (mph)? Provide your answer to the nearest tenths.arrow_forward
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