Engineering, 23.02.2021 01:30, dinosaur10

Due to crashes at a railroad crossing in Salem, Oregon, an overpass (with a roadway surface 26 ft above the existing road) is to be constructed on an existing level highway. The existing highway has a design speed of 50 mi/h. The overpass structure is to be level, centered above the railroad, and 180 ft long. What length of the existing level highway must be reconstructed to provide an appropriate vertical alignment

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Due to crashes at a railroad crossing in Salem, Oregon, an overpass (with a roadway surface 26 ft ab...