19th-century London (1819), Waterloo Bridge (1817), the Hungerford Bridge (opened in 1845 as a footbridge, and converted in 1859 into a combination footbridge/railway bridge for Charing Cross Station), and Tower Bridge (1894). Further upriver, the new bridges included Lambeth Bridge (1862), which replaced a centuries-old cross-river ferry service, Vauxhall Bridge (opened 1816), Victoria Bridge (opened in 1858 and later renamed the Chelsea Bridge), and Wandsworth Bridge (1873). The impetus for this building was London's massive population growth, which put a constant strain on existing communications between the north and south banks. London Bridge remained the city's busiest artery for the entire century,
London Bridge Greater London Authority. The crossing also delineates an area along the southern bank of the River Thames, between London Bridge and Tower Bridge, that has been designated as a business improvement district. The abutments of modern London Bridge rest several metres above natural embankments of gravel, sand and clay. From the late Neolithic era the southern embankment formed a natural causeway above the surrounding swamp and marsh of the river's estuary; the northern ascended to higher ground at the present site of Cornhill. Between the embankments, the River Thames could have been crossed by ford when the tide was low,