MILAN (AP) — A long-delayed and debated bridge linking the Italian mainland with Sicily cleared a major hurdle Wednesday, allowing work to begin on what would be the world’s longest suspension bridge, despite concerns over earthquakes, environmental impacts and the threat of mafia interference.

An interministerial committee with oversight of strategic public investments approved the 13.5 billion euro ($15.5 billion) project, the Transport Ministry said in a statement. Transport Minister Matteo Salvini said the project will be “an accelerator for development” in southern Italy.

Preliminary work could begin later this summer with construction expected to start next year.