Together, the work done comes to more than 30 kilometres of route and it is envisaged that it will come into service throughout 2003 and 2004. In transport infrastructures, the Baix Llobregat Tramway is being built, which will run along the Avenida Diagonal in Barcelona; and the Besós Tramway, in which the COMSA Group is working on the construction of the sections that will join the city with the Forum 2004 esplanade. In addition, the COMSA Group has been granted the concession for the maintenance of the installation of both lines for the first 25 years.