what is the desirable superelevation that should be applied to a curve radius 124m, for a posted speed of 50km/h. Assume that this is a two-lane rural road that will be used by cars and trucks. a) 6.0% b) 5.8% c) 7.0% d)5.5%
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Subject : Transportation engineering
Read the question carefully and give me right answer according to the options.
what is the desirable superelevation that should be applied to a curve radius 124m, for a posted speed of 50km/h. Assume that this is a two-lane rural road that will be used by cars and trucks.
a) 6.0%
b) 5.8%
c) 7.0%
d)5.5%
Step by step
Solved in 2 steps with 2 images
- 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.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?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
- Answer the following: 1. Identify the design speed, minimum surface, outside shoulder, and paved shoulder slope for the following specification of the road: a. A local road in urban area with 180 ADT b. A collector roadway in rural area, mountainous, and with 580 ADT c. A local road in rural area, rolling terrain and with 420 ADTQuestion 29 Determine the impact factor for a highway curve having a radius of 1,694 ft and maximum design speed of 51 kph. Express your answer in 4 decimal places.Subject : Transportation Engineering Read the question carefully and give me right solution according to the question. A two lane-two way highway 7.5 m wide with a right-turn curve. The design speed is 100 kph and the difference in elevation between the edges of the fully super-elevated cross-section is 0.45 cm. Determine the setback of a building corner required for satisfying safe stopping sight distance.
- Subject : Transportation engineering Read the question carefully and give me clear solution. Remember given question is related to vertical curve not the horizontal curve. Compute the minimum length of vertical curve that will provide 190 m stopping sight distance for a design speed of 100 km/h at the intersection of a - 2.60% grade and a -2.40% grade.The radius of a horizontal curve on an existing highway was field-measured to be 810 ft. The pavement on this two-lane highway is 22 ft wide, and the elevation difference between the inside and outside of the curve is 1.43 ft. The posted speed limit on the road is 60 mi/h. Is this a hazardous location? If so, why? What action will you recommend to correct the situation?47 Determine the impact factor for a highway curve having a radius of 1,997 ft and maximum design speed of 56 kph. Express your answer in 4 decimal places.
- 4. Four-leg intersection on Rural 4-lane highway; Major highway volume = 150 veh/hr/In; Left-turn volume= 15 veh/hr/ln; Use Guideline given in NCHRP Report 745, determine whether a left-turn lane is recommended? 5. 4-lane highway; Major road grade = 2.7%; Minor road approach grade = 4%; Vmajor = 55 MPH; Find left turn and right turn departure sight distances for a passenger car.An existing horizontal curve has a radius of 85 meters, which restricts the maximum speed on this section of road to only 60% of the design speed of the highway. Highway officials want to improve the road to eliminate this bottleneck. Assume coefficient of side friction is 0.15 and rate of superelevation is 0.08. Compute the existing speed, design speed, and find the new radius of curvature.Question 5a) As the Area Engineer of Ghana Highway Authority, a lot a complains from drivers and passengers have come to you concerning an uncomfortable weight loss sensation usually experienced at a particular sag curve. You have therefore been tasked to redesign this sag curve to eliminate the weight loss sensation. How would you achieve this objective?