Speaking at the presentation of the planned expansion of metro system, at a cost of €307 million between now and 2022, Costa said this was part of "a route that cannot stop". He explained that the government’s national infrastructure programme, currently being debated in parliament, foresees a next round of transport planning involving "investment of more than eight hundred million euros for the development of the AMP transport network".

The funds, he said, “will no longer be managed by the government but fully by the AMP, which will duly apply it in its strategy to development the region.”

Of the total, the prime minister said, €600 million is to expand the city’s metro system and €200 million for "metrobus networks" – that is, buses running in segregated lanes that have priority over other vehicles at junctions.