[4] However, the line was forced to suspend its operations just five months after opening, due to repeated flooding in the tunnels.

The M2 shared all its track with the already-existing mainline that links Palma with Inca, Sa Pobla and Manacor; as such, the work necessary to launch the line was minimal.

[7] As early as 2005, prior to the opening of the metro, future extensions were proposed, including from Estació Intermodal to the Port of Palma, using an old tunnel underneath the city.

[9] In 2019, a one-station, 1.5 km extension of M1 from its current UIB terminus to the Parc Bit science and technology park was agreed,[10] and is due to open in 2020.

[12] A 2.1 km branch from Camí dels Reis station to the Son Espases University Hospital [ca; es] was proposed in 2019.