In 1975, after the Portuguese Revolution, the ferry service was nationalised and the operator was re-named Transtejo. Two years later five ex-Hamburg ferries were acquired and further acquisitions were made between 1981 and 1984, and in the 1990s. The most striking change was the acquisition of British-built catamarans which started on the service to Montijo in 1995. Later catamarans have been built in Australia or Singapore. Transtejo celebrated its 25th anniversary on 21 July, 2000 by holding a "festa" for all of its employees at the Seixal terminal. Good observation points are a little limited, though the walkway along the riverside between Praça do Comércio and Cais do Sodré used to be a very pleasant observation spot, at night it could be a little less savoury. The riverside walk from the Pç. do Comércio to Cais do Sodré, at one time a pleasant evening stroll, has been blighted for some time by road and building works so that, now, better views by far can be had by taking a ferry to Cacilhas and back and observing the other vessels en route. Ferries are very cheap and frequent. Despite the advent of the two fixed-river crossings, the expansion of population on the south bank of the estuary has helped to keep the ferry routes well used, if less so than in the past. The 2008 completion of the MTS metro link to Cacilhas may actually boost traffic, as the metro terminal is just across the road from the ferry terminal.