Development Of A Construction Project And Executive Projects Together With Obtaining Administrative Decisions Necessary To Build The Downtown Beltway On The Section From Ronda Wiatracza To Ul. Radzymińska As Part Of The Investment Task Entitled Construction Of The Śródmiejska Beltway On The Episode From The Wiatracza Roundabout To The "Żaba" Roundabout, Including: A. Stage I - Episode From Ronda Wiatracza To Ul. Radzymińska - Preparatory Work "