The radius of horizontal circular curve is 125 m, calculate the superelevation required if full lateral friction is to develop, assume f=0.25, max e= 0.07, recommended design speed under DPWH design, national secondary road, flat topography.

The following table shows the stations and ordinates for a mass diagram. The free-haul distance is 600 ft. Overhaul cost is $12 per station yard. (a) Use the method of moments to compute the additional cost that must be paid to the contractor. (b) Sketch the ground profile if the finished grade of this roadway section is level (0 percent).