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Find the width of a 2-lane pavement on a horizontal curve and a rolling terrain given that the design speed is 80Km/hr, the normal width

Find the width of a 2-lane pavement on a horizontal curve and a rolling terrain given that the design speed is 80Km/hr, the normal width of the carriageway is 7m, the design truck is 6m long, superelevation is 0.06, coefficient of side friction is 0.15 and the design radius of the curve is 230m

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