Summer is here, mobility in Barcelona decreases and, as every year, Transports Metropolitans de Barcelona (TMB) takes advantage of the downturn to carry out the toughest improvement works on the network. This summer, the most important actions will be carried out on L1, L9 and some interchanges such as Verdaguer and Plaça de Catalunya. Before starting the works, TMB will carry out information campaigns to warn citizens about the changes.