Frequently asked questions

No. It is an independent concept proposal, prepared with the rigour of a real study. It has not been approved or commissioned by any public body. Real data is sourced; other figures are labelled estimates.

A bridge here would have to clear large ships, requiring a very tall structure and long ramps that do not fit Lisbon’s and Cacilhas’ historic waterfronts. A tunnel links the stations directly, without touching the river landscape.

That is not planned. The ferry keeps serving other destinations and people who prefer crossing on the water. The metro adds a frequent alternative for those who need speed and regularity.

About 3 min Estimate between stations, with a train every three minutes at opening. Today the ferry takes 10 min7 on the water and leaves every 15–20 min7.

The aim is full integration into the metropolitan fare system: the same pass and tickets already used on the metro, ferry and Metro Sul do Tejo.

Yes. The whole route from street to train is step-free, with duplicated lifts and level boarding.

No. The tunnels are bored by machines working beneath the riverbed. The visible works are at the two stations, on land.

Station works should last about 5 years Estimate, from 2033 to 2038. The roof slab is built early, so the square returns to public use while excavation continues below.

That is not planned. Some connection works at the existing stations need occasional closures, at night or at weekends, announced in advance.

Yes. There are two separate tunnels, linked by passages every 240 m: in an emergency, you walk into the other tunnel, which acts as the place of safety. Ventilation controls smoke and pumps handle any water ingress.

Lisbon must be ready for strong earthquakes like 1755 (estimated magnitude 8.5–9 Mw5). Deep tunnels move with the ground and generally perform well; the design strengthens the station junctions and includes floodgates.

The estimate is 1.9 € bn Estimate at 2026 prices, including a risk margin. A project like this would normally be funded by the State with support from EU funds and the European Investment Bank.

The target is 2040 Estimate. The programme includes 12 months of float, and we also state an adverse case of late 2041. See the Cost & schedule sheet.

In a real project, through the public consultation of the Environmental Impact Assessment, planned for 2029–2031. Until then, this proposal is meant to open the discussion.