Romania and Bulgaria will accede in 2013 to the joint air space, which will transcend geographical borders, allowing optimised routes and cheaper plane tickets, according to an EU project, Mediafax reports. The EU initiated in 2004 the project Single European Sky – SES, meant to create an integrated air space by introducing common norms in the member states. SES presupposes creating “functional blocks of air space” designed beyond national borders and developed around traffic flows. The new criteria for space configuration will depend on technical and operational needs, rather than geographical borders. Romania and Bulgaria also decided, in 2004, to set up an air block by joining their two air spaces.