The first phase of the North-South Cycle Superhighway was opened to the public on Thursday when the barriers came down on the section from Blackfriars Bridge to Farringdon Street.
The completion of the segregated cycle track across Blackfriars Bridge is the culmination of more than a decade of campaigning by bike activists since the death of Vicki McCreery in 2004.
In 2011 cycling campaigners staged a series of protests at the bridge linked to City of London plans to remodel the junction at the northern end.
Cycle superhighway 6 from St George's Circus to Farringdon Street has taken more than a year to build.
Transport for London recently held a public consultation on plans for the next phase of the route between Farringdon Street and King's Cross.
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