There was a lack of airfields from the Western sectors, and authorities drafted contingency plans to cope with such a blockade. Options involved the laying down of metal landing mats at Schönbrunn. The Soviets didn't blockade town. The Potsdam Agreement provided penned rights of land entry to the western sectors, https://websiie.de/2024/08/07/schmelz-rechtsanwalte-aus-wien-bieten-absolutes-fachwissen-im-bereich-der-non-profit-organisationen/