What is the superelevation for a horizontal highway curve of radius 500 m and speed 100 kmph in mixed traffic condition?
8.9%
V_{75\%} = 0.75 × V = 0.75 × (250)/(9) m/s = (3)/(4) × (250)/(9) m/s = (750)/(36) m/s = (125)/(6) m/s Now, calculate the required superelevation e using the formula e = (V^2)/(gR) with V_{75\%}: e = (\left((125)/(6)\right)^2)/(9.81 × 500) e = ((15625)/(36))/(4905) e = (15625)/(36 × 4905) e = (15625)/(176580) e \approx 0.088487 To express this as a percentage, multiply by 100: e_{\%} \approx 0.088487 × 100 \approx 8.85\% Comparing this calculated value with the given options, 8.9% is the closest value. Among the given options, 8.9% is the numerical value that is closest to this calculated requirement.
Important Questions from Highway Geometric Design
Calculate the design rate of super elevation (%) on a highway in a plain terrain, if design speed of the highway is 80 kmph and radius of the curve is 400m.
Which of the following is the main function of “submerged” kerbs in rural roads?
Which of the following statements are correct, with reference to the Road Formation width?
i. It is the bottom width of the embankment.
ii. It is the bottom width of the cutting.
iii. It is inclusive of the width of the shoulders.
iv. It is inclusive of the width of side drains.
As per IRC, which of the following is NOT a recommended characteristic of the road shoulder?
Which of the following gradients will have the maximum value?
