Some notes on transportation; Strikes on transportation are usually announced a week in advance and in the case of bus and rail, there is a minimum service level that is maintained. For the metro (subway), busses replace the trains. Strikes usually last only a day or two. A monthly bus pass, which includes the metro, trains and ferries, is €40 for a month and €20 for seniors in the Lisbon metropolitan region. The free pass covers just trips within the city of Lisbon. The CP app doesn't seem to work for regional trains, but it does work for Intercity and Alfa Pendular trains. You could also use long distance busses, such as Rede Expressos, which are almost as fast as the regional trains.