Single European Sky
Since 2004, the European Union (EU) has gained competences in air traffic management (ATM) and the decision-making process has moved away from an intergovernmental practice to the EU framework. The EU’s main objective is to reform ATM in Europe in order to cope with sustained air traffic growth and operations under the safest, most cost- and flight-efficient and environmentally friendly conditions.
The link address is: https://ec.europa.eu/transport/modes/air/ses_en