The government says the road and rail link will create jobs and lift the economy of the region, but critics are concerned about the environmental and social impact.

The US$15.5 billion project was approved on Wednesday despite long-standing concerns over earthquakes, the mafia, and its military classification.

Italy's government gave final approval on Wednesday to the construction of what will be the world's longest single-span bridge, linking Sicily to the mainland, despite environmental, financial and other concerns that have delayed it for decades.