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- The radius of a horizontal circular curve is 100 m. The design speed is 50 km/h and the design coefficient of lateral friction is 0.15. Determine the rate of superelevation to be provided, if full lateral friction is assumed to develop.Compute the impact factor for a horizontal curve radius of 400 m if the design speed is 120 kph. Also, compute for the centrifugal ratio.The banking of the road way is 10 degrees at a radius of curvature of 80m, what will be the maximum velocity for a 2 ton vehicle and a 5 ton vehicle if the coefficient friction is 0.4 ?
- A highway curve has a super elevation of 7degrees. Find the radius of curve in meters so that there will be no lateral pressure between the tires and the roadway at a speed of 40 mph.The super elevation of the horizontal curve is 0.12 m/m. A car can travel a maximum speed of 80 kph. Find the coefficient of friction between the tire and the road if the radius is 70 m. a. 0.52 b. 0.62 c. 0.72 d. 0.42A highway curve with a radius of 150 meters is banked so that there is no lateral pressure (friction) on the wheels of a car at a speed of 50 km/hr. A car weighing 16.50 KN with tread G = 1.50 meters and height h = 0.70 meters travels around the curve at 100 km/hr. What is the safe angle of inclination of the banked highway curve
- The radius of a highway curve is 120 m, and has an angle of 9.31° from the horizontal. The center of gravity of the car is located 0.80 m above the roadway and the distance between the two front wheels is 1.2 m. If the car has a total weight of 15 KN. a. Determine the normal acceleration and the velocity (in kph) of the car before overturning. b. Find the maximum velocity of the car could move along the curve so that there will be no outstanding pressure between the tires and the roadway. c. If the coefficient of kinetic friction is 0.60, what is the maximum velocity (in kph) of the car without sliding.If the angle of embankment is 6.97 degrees, what is the minimum radius of curvature infeet of a highway so that there will be no lateral pressure on the car’s wheel at a speedof 55 kph.A two-lane highway (one 3.6-m lane in each direction) with a design speed of 100 km/h goes from normal crown with 2% cross-slope to 6 % superelevation by means of a spiral transition curve. The spiral curve is 60m long. If the superelevation is attained by rotating the road section around its centreline, draw a cross section of the road at 10, 20 and 50m from TS
- When aligning a highway in a traffic area, it is necessary to provide a horizontal circular curve of radius 295 m , if the design speed is 60 kph , determine the superelevation rate. ( Superelevation to fully counteract centrifugal force use only 75% of the design speed).A highway curve with a radius of 600 m is to be banked for a speed of 80 km/hr. What should be theangle of bank so that at the design speed, there will be no frictional force necessary on the tire in adirection perpendicular to the plane of rolling?A vertical alignment for a single carriageway road consists of a parabolic crest curve connecting a straight-line uphill gradient of +4% with a straightline downhill gradient of -3%. Determine the following: (1) Calculate the vertical offset at the point of intersection of the two tangents at PI (2) Calculate the vertical and horizontal offsets for the highest point on the curve.Assume a design speed of 85km/hr and use the absolute minimum K value for crest curves. Show the complete solution asap.