Named Danube connectivity component implementation milestone

Assume corridor implementation by 2027-03-31 centers on a named Danube connectivity element rather than a broad three-country rollout. The initiating change is an effective financing, permitting, procurement, contracting or construction milestone for the Ruse-Giurgiu-Bucharest railway, a new Danube road-and-rail bridge, or another named Danube crossing explicitly tied to the Aegean-Danube-Black Sea corridor. Known scope is the Danube or Ruse-Giurgiu-Bucharest component within the reported €22.8 billion, 25-project corridor; exact capacity additions, bridge specifications, toll or access arrangements, project-level costs, contractor economics and completion dates remain unavailable unless later reported.