Italian prosecutors have opened a corruption investigation linked to the long-delayed plan to build a bridge between Sicily and mainland Italy, adding fresh legal scrutiny to one of Prime Minister Giorgia Meloni’s most politically visible infrastructure projects.
The Rome Public Prosecutor’s Office said on Tuesday that it was investigating alleged corruption and the alleged disclosure of official secrets connected to the Strait of Messina bridge project. According to Italian reporting, three people are under investigation, including a retired judge who had served at the Court of Auditors.
The case concerns allegations that the former judge, while sitting on the court that assessed the bridge project, provided confidential assistance to a lawyer and a businessman. Prosecutors allege that this support included information linked to the project, in exchange for help in securing a paid public-sector role after retirement.
The investigation does not amount to a finding of guilt. It does, however, bring renewed attention to the governance of a project that has been debated for decades, repeatedly revived and repeatedly halted. The proposed bridge would cross the Strait of Messina between Calabria and Sicily. If built, it would be the world’s longest single-span suspension bridge.
The project has an estimated cost of €13.5 billion and has been strongly backed by Meloni’s government and by Infrastructure Minister Matteo Salvini. The government presents it as a strategic infrastructure project that would connect Sicily more directly to the national rail and road network, improve mobility in southern Italy and support economic development.
The bridge would span around 3.7 kilometres, with a suspended section of approximately 3.3 kilometres. Previous project information has described a structure carrying road and rail traffic, with six road lanes, two railway tracks and additional service lanes. The works would also require extensive road and rail connections on both sides of the strait.
The latest investigation matters because the project has already faced institutional obstacles. In October last year, Italy’s Court of Auditors refused to authorise the plan, dealing a major setback to the government. The court’s objections did not end the political push behind the bridge, but they slowed its progress and forced the government to address legal and administrative concerns before work could move ahead.
The new probe now places the project under a different type of pressure. Rather than a technical dispute over approvals, it raises questions about access to confidential information, possible influence around public decision-making and the integrity of oversight procedures. For a project of this scale, such issues are not secondary. They go directly to public trust, procurement credibility and the management of state-backed infrastructure spending.
The company overseeing the project, Stretto di Messina, has said it is not involved in the investigation, according to Reuters. The infrastructure ministry did not immediately comment on the matter. The absence of a direct allegation against the project company does not remove the political difficulty for the government, which has made the bridge a flagship element of its infrastructure agenda.
The Strait of Messina bridge has long divided opinion in Italy. Supporters argue that it would reduce Sicily’s isolation, shorten travel times, improve freight links and provide a visible commitment to the development of the south. They also argue that major infrastructure is needed if Italy is to address long-standing regional imbalances between the north and the Mezzogiorno.
Critics question whether the project represents the best use of public money. They point to environmental risks, seismic concerns, possible disruption to coastal communities and the opportunity cost of spending billions on a single structure when southern Italy also needs investment in existing railways, roads, ports, schools and public services. Opponents have also repeatedly warned that large construction projects in southern Italy require particularly strong anti-corruption safeguards.
Those concerns have been sharpened by the scale of the funding involved. A €13.5 billion public infrastructure project creates risks around procurement, subcontracting, land, materials, consultancy work and oversight. Even where formal anti-mafia and transparency controls exist, the political sensitivity of the bridge means that any corruption-related inquiry can affect the wider credibility of the scheme.
The Meloni government has attempted to frame the bridge as more than a transport project. It has also been discussed in the context of strategic infrastructure and military mobility, particularly as NATO members face pressure to increase defence-related spending. That argument has itself been controversial, with critics questioning whether a bridge between Sicily and Calabria should be presented as a defence asset.
For Brussels and other European capitals, the case is not only an Italian domestic matter. It illustrates the wider challenge of delivering large infrastructure projects at a time when governments are using public investment to support competitiveness, security and regional development. The problem is not only whether governments can find the money. It is whether approval systems, audit bodies and procurement procedures can withstand political pressure.
The investigation may not stop the bridge project by itself. But it has revived the central question surrounding the Strait of Messina plan: whether Italy can deliver a project of this size while maintaining public confidence in its legal, environmental and financial safeguards.
For Meloni and Salvini, the bridge remains a test of political will. For prosecutors and auditors, it is now also a test of institutional oversight. The outcome will determine not only the future of a long-promised bridge, but also the credibility of one of Italy’s most ambitious public works programmes.
