Principles Of Highway Engineering And Traffic Analysis
7th Edition
ISBN: 9781119493969
Author: Mannering, Fred L., WASHBURN, Scott S.
Publisher: Wiley,
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Question
Chapter 3, Problem 34P
To determine
Thereconstructed length of existing level of highway which provides an appropriate vertical alignment.
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A new basic freeway segment will have 3 lanes in each direction. The left and center lane each has a width of 12 ft while the width of the right lane is 13 ft. The left shoulder is 4 ft while the right shoulder is also 4 ft. There are 2 interchanges within 6 miles (3 miles upstream and 3 miles down stream).The site has level terrain, the design speed is 80 mph the hourly design volume is 5250 veh/h, which includes 9.0% trucks and buses. The peak hour factor is 0.870.
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Chapter 3 Solutions
Principles Of Highway Engineering And Traffic Analysis
Ch. 3 - Prob. 1PCh. 3 - Prob. 2PCh. 3 - Prob. 3PCh. 3 - Prob. 4PCh. 3 - Prob. 5PCh. 3 - Prob. 6PCh. 3 - Prob. 7PCh. 3 - Prob. 8PCh. 3 - Prob. 9PCh. 3 - Prob. 10P
Ch. 3 - Prob. 11PCh. 3 - Prob. 12PCh. 3 - Prob. 13PCh. 3 - Prob. 14PCh. 3 - Prob. 15PCh. 3 - Prob. 16PCh. 3 - Prob. 17PCh. 3 - Prob. 18PCh. 3 - Prob. 19PCh. 3 - Prob. 20PCh. 3 - Prob. 21PCh. 3 - Prob. 22PCh. 3 - Prob. 23PCh. 3 - Prob. 24PCh. 3 - Prob. 25PCh. 3 - Prob. 26PCh. 3 - Prob. 27PCh. 3 - Prob. 28PCh. 3 - Prob. 29PCh. 3 - Prob. 30PCh. 3 - Prob. 31PCh. 3 - Prob. 32PCh. 3 - Prob. 33PCh. 3 - Prob. 34PCh. 3 - Prob. 35PCh. 3 - Prob. 36PCh. 3 - Prob. 37PCh. 3 - Prob. 38PCh. 3 - Prob. 39PCh. 3 - Prob. 40PCh. 3 - Prob. 41PCh. 3 - Prob. 42PCh. 3 - Prob. 43PCh. 3 - Prob. 44PCh. 3 - Prob. 45PCh. 3 - Prob. 46PCh. 3 - Prob. 47PCh. 3 - Prob. 48PCh. 3 - Prob. 49PCh. 3 - Prob. 50PCh. 3 - Prob. 51PCh. 3 - Prob. 52PCh. 3 - Prob. 53PCh. 3 - Prob. 54PCh. 3 - Prob. 55PCh. 3 - Prob. 56PCh. 3 - Prob. 57PCh. 3 - Prob. 58PCh. 3 - Prob. 59PCh. 3 - Prob. 60PCh. 3 - Prob. 61PCh. 3 - Prob. 62PCh. 3 - Prob. 63PCh. 3 - Prob. 64PCh. 3 - Prob. 65PCh. 3 - Prob. 66PCh. 3 - Prob. 67P
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- A long segment of suburban freeway is to be designed on level terrain. The level segment, however, is followed by a 4.5% grade, 2.0 miles in length. If the DDHV is 2,500 vehicles per hour with 15% trucks (standard mix), how many lanes will be needed on the (A.) Upgrade, (B.) Downgrade, (C.) Level terrain segment to provide for level of service C? Lane widths and lateral clearances may be assumed to be 12 feet and 6 feet, respectively. Ramp density is expected to be 1.0 ramps per mile. The PHF is 0.92. Good weather, no incidents, no work zones, and regular users of the facility may be assumed.arrow_forwardDesign a highway with the following criteria (Determine the minimum radius, widening and check if it needs transition spiral) Design speed = 85 kph I = 20o e = 0.06 sight distance = 125m m = 10 m 2 lane road Typical car wheel length 2.5 m Width of pavement per lane = 3.6 m PreviousNextarrow_forwardAn urban freeway presently has three 12-ft lanes on a 3 percent upgrade 1.75 mi long. The traffic includes 8 percent trucks and buses (recreational vehicles are negligible). There are no lateral obstructions. Design speed is 70 MPH. (a) What is the present capacity of the upgrade? (b) How much could the capacity be increased by widening and remarking the existing traveled way to provide four 10-ft lanes up the grade?arrow_forward
- A highway is being designed to AASHTO guidelines with a 70 mph (113 km/h) design speed and at one section an equal tangent vertical curve must be designed to connect grades of +1% and -2%. Then; Determine the minimum length of the curve necessary to meet SSD requirements.arrow_forwardWhat super-elevation rate would you recommend for a roadway with a design speed of 110 kph and a radius of 1400 ft? Assume f=0.11.arrow_forwardDuring peak periods, “Trotro” drivers use the shoulders as travel lanes on the section of the Kasoa road approaching the toll booth from the West Hills Mall direction. As a Highway Engineer, what design intervention would you propose to prevent the shoulders from being used as travel lanes during congested period or as part-time shoulders but still function as shoulders? (CR,5)arrow_forward
- Determine the LOS on a regular weekday on a 1.5-mile segment of an 8-lane freeway (four lanes in each direction) in rolling terrain. Use the following data.arrow_forwardThe C-5 Southlane Freeway/Expressway having 6 lanes (three lanes in each direction) is 3.6m wide per lane and has an edge distance of 2 m to the nearest obstruction. A total of 26 on-or off-ramps within the 40 km span, from which 3 ramps are located within 5 km upstream and 4 ramps within 5 km downstream from the midpoint of the analysis segment can be observed. Determine the free-flow speed of the existing freeway, in kph. Do not round-off your FFSarrow_forwardDetermine the minimum and designed radius of a highway curve with a design speed 33.33 m/s, with a banking of 7%, and a sight distance of 125 meters with 10 meter distance from the obstruction. pls answer w/ complete solutionarrow_forward
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