What type of gesture does Minority languages of Austria and Austrian State Treaty have in common?
Austrian State Treaty The Austrian State Treaty (German:    ) or Austrian Independence Treaty re-established Austria as a sovereign state. It was signed on 15 May 1955 in Vienna, at the Schloss Belvedere among the Allied occupying powers (France, the United Kingdom, the United States, and the Soviet Union) and the Austrian government. It officially came into force on 27 July 1955.
Vienna Convention on Road Signs and Signals The Convention on Road Signs and Signals, commonly known as the Vienna Convention on Road Signs and Signals, is a multilateral treaty designed to increase road safety and aid international road traffic by standardising the signing system for road traffic (road signs, traffic lights and road markings) in use internationally.