To 22 ports; the busiest crossings are to Westminster (7 minutes, 23 times a day), Embankment (17 minutes, 23 times a day), Blackfriars (26 minutes, 23 times a day), Bankside (30 minutes, 23 times a day), London Bridge (36 minutes, 23 times a day), Tower of London (40 minutes, 23 times a day), Canary Wharf (51 minutes, 23 times a day) and Surrey Quays (56 minutes, 23 times a day).