materials and panes of glass. Facilities for passengers include one or two shelters equipped with an intercom, a PA system, a passenger information display (PID), a CCTV system, a noticeboard and ticket vending machines. The shelters were designed by architects Antoni Roselló and Rafael Cáceres, who were awarded in the design section of the 2004 City of Barcelona Awards for this design. Routes Three east–west routes currently make up the Trambesòs system. The Gran Via section is used by both routes T5 and T6, while the Avinguda Diagonal section and the branch in the La Mina neighbourhood are only used by routes T4 and T6, respectively. All routes converge at Plaça de les Glòries Catalanes, becoming the only stop of the whole network that provides a transfer to all Trambesòs routes. Routes are generally displayed by a teal square with a white "T" followed by the route number in it (e.g. ). Trambaix routes are also displayed with a "T" to stand out those are also tram services so the difference between the two networks is on the numbering: Trambaix uses numbers 1–3, while Trambesòs uses numbers 4–6. Route T4 starts near Parc de la Ciutadella in Barcelona and addresses towards Plaça de les Glòries Catalanes through Avinguda Meridiana. Then it continues towards Sant Adrià de Besòs railway station via Avinguda Diagonal and Avinguda d'Eduard Maristany, where it runs parallel to the sea. Route T5 starts at Plaça de les Glòries Catalanes and terminates at Gorg metro station in Badalona via the Gran Via section. Route T6 runs from Plaça de les Glòries to Sant Adrià de Besòs railway station sharing the Gran Via section together with route T5 and via the branch that passes across La Mina neighbourhood in Sant Adrià. Formerly, this route had run from Sant Adrià de Besòs railway station to Gorg metro station in Badalona via La Mina branch without entering Barcelona. Future developments Linkage with Trambaix The original project about the introduction of a modern tram system in Barcelona comprised the creation of a new tram route covering the whole Avinguda Diagonal, between Zona Universitària and Diagonal Mar shopping mall. With the opening of Trambaix and Trambesòs, the possibility of creating a new tram line through Avinguda Diagonal connecting both networks became more popular, and even saw a demonstration in favour of the union of the two tram networks in late September 2005. That