The ruling minimum radius of the horizontal curve of a national highway in plain terrain for a ruling design speed of 100 km/hour with e = 0.07 and f = 0.15 is close to
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- 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.0.053 b.0.054 c.0.055 d.0.052What is the absolute minimum radius of curve for safe operation at a speed of 110 kph? a. 440 m b. 110 m c. 220 m d. 570 mA horizontal curve has a maximum speed of 50 mph. If e = 0.10, and f = 0.16, find the degree of the curve. a. 4.84 deg b. 5.84 deg c. 3.84 deg d. 6.24 deg
- Compute the ruling minimum radius of horizontal curve for a design speed of 80 kph,f=0.18 and e = 0.078. For ruling minimum radius, increase the design speed by 16 kph.The ascending of a vertical curve is 1/45 and descending gradient is 1/55. If the design speed is 60 km/hr and rate of change of acceleration of 0.4 m/s3, calculate the minimum length of the curve.The radius of the horizontal curve is 280 m. long having a super elevation of 0.06. How fast can a car move along the curve in kph if it has a coefficient of lateral friction equal to 0.12. a. 88.87 kph b. 88.78 kph c. 77.87 kph d. 77.78 kph
- A horizontal curve on a two-lane highway is designed with a 610-m radius, 3.5-m lanes, and 80 kph design speed. Determine the distance that must be cleared from the inside edge of the inner lane to provide sufficient stopping sight distance. (Note: Curve radius is typically reckoned from the centerline of the roadway, and driver location is assumed to be at the middle of the travelled lane.) Assume coefficient of friction as 0.35. ANSWER M =4.0 ?Q3: A horizontal curve is to be designed for a two-lane road in mountainous terrain.The following data are known: Intersection angle: 30 degrees, tangent length = 150 m,station of PI: 2+750.000, fs = 0.10, e = 0.08.The centerline of two parallel tracks is connected by a reversed curve. The angle of intersection of the first curve is 15° and the distance between parallel tracks is 30m. If the radius of the second curve is 300m.Compute the radius of the first curve.
- A horizontal curve is to connect PC on freeway B and PT on freeway A to serve traffic turning from freeway B be two freeway A if the design speed is 45 mph (66 ft per second) super elevation is 2.5 and the coefficient of friction between tire and pavement is .10 what should be the minimum radius of the horizontal curve in feet?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 horizontal curve is being designed through mountainous terrain for a four-lane road with lanes that are 12 ft wide. The central angle (Δ) is known to be = 24o30’ 15”, the tangent distance is 600 ft, and the stationing of the tangent intersection (PI) is 700+00. Under specified conditions and vehicle speed, the roadway surface is determined to have a coefficient of side friction of 0.08, and the curve’s superelevation is 0.06 ft/ft. What is the stationing of PC and PT and what is the safe vehicle speed?