Sample Problem 2 A -3.00% grade meets a +5.00% grade near an underpass. In order to maintain the minimum clearance allowed under the bridge and at the same time introduce a vertical transition curve in the grade line, it is necessary to use a curve that lies 200 m on the back tangent and 100 m on the fonrvard tangent. The station at the beginning of the curve is 10 + 000 and elevation of 228 m. ' Det. the elevation at 10 + 040 ' If the uphill edge of the under side of the bridge is at station 10 + 220 and at elevation 229.206 m, what is the vertical clearance under the bridge at this point? Determine the stationing of the lowest point of the curve