The total width of the pavement on a horizontal circular curve = 7.5 m and the superelevation is 0.06. Calculate the magnitudes of raising at the outer edge of the pavement with respect to the central line and inner edge, respectively.
Concept: Superelevation:To counteract the effect of centrifugal force and to reduce the tendency of the vehicle to overturn or skid, the outer edge of the pavement is raised with respect to the inner edge, thus providing a transverse slope throughout the length of the horizontal curve. This transverse inclination to the pavement surface is known as superelevation or cant. If the pavement is rotated about the inner side, Then rise of outer edge = e × W If the pavement is the rotated about center line, Then rise of the outer edge = Where e = Superelevation and W = Width of pavement Calculation: Given, Width of the pavement = 7.5 m and Superelevation = 0.06 When rotated about the inner side, Rise of outer edge = e × W = 0.06 × 7.5 = 0.45 m When rotated about the center line, Rise of outer edge