Because most of the city's traffic goes along the Canal rather than across it, only one bridge crossed the canal until the 19th century, the Rialto Bridge. There are currently three more bridges, the Ponte degli Scalzi, the Ponte dell'Accademia, and the controversial Ponte della Costituzione from 2008, designed by Santiago Calatrava, connecting the train station to Piazzale Roma, one of the few places in Venice where buses and cars can enter. As was usual in the past, people can still take a ferry ride across the canal at several points by standing up on the deck of a simple gondola called a "traghetto", although this service is less common than even a decade ago.