Application Of The Department Of Transportation Of The Commonwealth Of Pennsylvania For Approval To Alter The Crossing By Lowering The Roadway Where State Route 0051, Section A63 (West Carson Street Viaduct) Crosses Beneath The Two Tracks Of Norfolk Southern Railway (Dot No. 510 610 R) M.P.2.30 In The City Of Pittsburgh, Allegheny County; And The Allocation Of Costs Incident Thereto.