However, operations were never fully suspended, and there was always at least the occasional freight and maintenance traffic along certain parts of the network. Some other parts, on the other hand, were essentially abandoned until 2005 when urban passenger services were reintroduced along a corridor between the suburbs of Pavas, to the west of San José, and San Pedro, to the east. Since then, services have been greatly increased following investment in second-hand DMUs imported from Spain and the rehabilitation of dozens of kilometres of previously inoperative track. , the bulk of railway operations occur in the Central Valley area and consist of passenger services between the San José suburbs of Pavas, Curridabat and Belen, and between San José and the cities of Heredia and Cartago. Work is now under way to rehabilitate further sections beyond these main termini, such as between Heredia and Alajuela, and from Cartago to Paraiso, in order to extend the existing services.