Question The superelevation for a rolling terrain on a curved portion of highway having radius 500 m and design speed 80 kmph in mixed traffic condition will be % (Answer correct upto one decimal place)
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- Given the following data: SSD = 430’ G = +3% Tpr = 2.5 sec Will the speed/velocity be acceptable if the road is generally posted at 30kph? Why or why not?A new transportation engineer is charged with the design of a horizontal curve a certain highway. His final design calls for a curve with a radius of 520 meters. Assume that the design speed for the highway is 110 km/h. Is the design curve acceptable? Consider super elevation of 8% and a maximum side friction factor of 0.1.Determine the value of PTSF for a 6-mile two-lane highway in rolling terrain. Traffic data are as follows: • Volume = 1600 veh/h (two-way) • Percent trucks = 14% • Percent RVs = 4% • Peak hour factor = 0.95 • Percent directional split = 50 - 50 • Percent no-passing zones = 50
- CALCULATE THE EXTRA WIDENING OF A PAVEMENT AND THE LENGTH OF TRANSITION CURVE NEEDED ON A TWO LANE HIGHWAY HAVING A LONGITUDINAL CIRCULAR CURVE OF RADIUS 300M. ASSUME DESIGN SPEED 80 KMPH, LENGTH OF WHEEL BASE OF LARGEST VEHICLE 6M. ASSUME SUITABLE DATA IF NEEDED.An existing Class I two-lane highway is to be analyzed to determine the level of servicein each direction, given the following information:Traffic data:PHV = 600 veh/h60% in the peak direction8% trucks2% recreational vehiclesPHF = 0.86No passing zones: 40%Geometric data:Rolling terrainBFFS = 55 mi/h (88 km/h)Lane width = 11 ft (3.3 m)Shoulder width = 2 ft (0.6 m)8 access points per mile (5 access points per km)Superelevation recommended for a highway with a horizontal simple curve radius (275) m, design speed (60) km/hr. is: *
- A 2-lane highway has lane widths of 2.75m, with 1.83m clear hard shoulders. There are no-passing zones along 40% of its length. The directional split is 60/40 in favour of the peak direction. The percentages of the various heavy vehicles types are: Trucks PT – 10%, Buses PB – 4%, Cars Pc – 2%. The terrain is rolling; calculate the service flow of the highway when running at full capacityThe average center to center spacing of vehicles in a simple lane highway is 50 m. The volume of traffic is 600 vehicles per hour. Determine the average speed of the cars using this lane.. helpProblem 3: Highway segment is going under planning review. Given the following facts: Lane Width = 3.4 m Number of Lanes (N) - 2 (in cach direction) Total Lateral Clearance = 3.0 m Median No Median The 85th % Speed was found to be 100 km/hr (i.e. BFFS = 100 km/hr) PHF - 0.83 Terrain Type: Rolling You are asked to: A. Determine the maximum peak-hour volume that the segment can serve at a LOS C. B. Make suggestions on how to increase the total capacity while maintaining the LOS at C without major investments.
- A section of rural 2 lane highway is to be designed to carry a peak hour volume of 1500 on a level terrain. Determine the level of service at which it will operate using the following data: V Lane width = 11 ft V No passing zone = 20% Directional split = 60/40 V Decimal fraction of trucks = 0.10 V Decimal fraction of recreational vehicles = 0.04 V Decimal fraction of buses = 0.01 Shoulder width =6 ft PHF = 0.95Determine the superelevation of a road section on an urban area with a design speed of 110kph, and Rmin=630m. What can you say about the computed value of e?A rural collector highway located in mountainous terrain is designed to carry a design volume of 2120 veh/day, Determine the folowing (use any necessary deta from this table and this tatie) (0) a suitable design speed (Enter the minimum design speed in m/h.) mi/h (b) lane and usable shoulder widths (in t) lane width shoulder width (c) maximum desirabie grade (as a percent) Need Help? Raad