Question 2 The maximum speed of a vehicle on a 4º curve having arc length 30 m is limited to 60 kmph. Calculate the psychological widening required on the curve.
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- The design speed for a two-lane road is 80 kmph. When a design vehicle with a wheel base of 6.6 m is negotiating a horizontal curve on that road, the off-tracking is measured as 0.096 m.The required widening of carriageway of the two-lane road on the curve is approximately ALLAThe design speed for a two-lane road is 70 kmph. When a design vehicle with a wheel base of 7 m is negotiating a horizontal curve on the road, the off-tracking is measured as 0.12 m. The required widening (in m) of carriageway of the two-lane road on the curve is approximately:Show complete solutionThe rated speed of a highway curve of 60-m radius is 45kph. If fk between the tires and the road surface is 0.5, find the maximum speed (in kph) at which a car can round the curve without skidding.
- The design speed on a BG track for a circular curve with transitions is 96 km/h. Determine the length of transition. Assume suitable values for the other data required to solve the problem.A six lane divided thoroughfare has a curve 1000m long and a radius of 500 m. The safe stopping distance is 200m. Calculate the minimum set – back distance from the inner edge of the road to the edge of a building to ensure safe visibility. The pavement width per lane is 3.5 mA curving roadway has a curve with a radius of 580 m. The superelevation has been set at 0.05, angle of 65o and the coefficient of side friction is found to be 0.20. In addition, the traffic engineer has designed the speed as 100 km/hr.i. Explain whether this designed speed will provide a safe vehicle operation or not?ii. Find middle ordinate M,
- The design speed for a two-lane road is 80 kmph When a design vehicle with a wheelbase of 6.6 m is negotiating a horizontal curve on that road, the off-tracking is measured as 0.096 m. The required widening of carriageway of the two-lane road on the curve is approximately: (a) 0.55 m (c)0.75 m (b) 0.65 m (d) 0.85 m1. The stopping sight distance on a curved section of a road is 500 ft. The superelevation of the curve is 4.5%. The current radius of the curve is 900 ft. What should be the design speed on the curve? (Using AASHTO tables)A single-lane racetrack is being constructed with a 150 mph design speed. A curve on this track has a radius of 4500 ft, central angle of 30 degrees, and a PI located at station 150+40. If the coefficient of side friction is 0.3, what superelevation is required for safe vehicle travel at the design speed? Also, determine the length of the curve and station of the PC and PT.
- The ‘e’ value of a crest curve is found to be greater than the eye height of the driver above the road surface. Determine the minimum length of the curve, if a hazard is assumed to be at the level of the carriageway and the driver has an average eye height from the road surface.Problem- 3, A road is provided with a horizontal circular curve having deflection angle of 55° and centre line radius of 250 m. A transition curve is to be provided at each end of the circular curve of such a length that the rate of gain of radial acceleration is 0.3 m/s³ at a speed of 50 km per hour. Length of the transition curve required at each of the ends isThe radius of a horizontal curve on an existing highway was field- measured to be 275 m. The on this two-lane pavement highway is 6.8 m wide, and the elevation difference between the inside edge and outside edge of the curve is 0.544 m. The posted speed limit on the road is 100 km/h. Determine the minimum radius of curvature to permit safe operation at the speed limit. 1