A new £211m extension of the Docklands Light Railway (DLR) has opened.
The 3.7-mile (6km) expansion from Canning Town to Stratford International forms a key part of the London 2012 Olympic Games transport network.
There are four new stations along the new route, which connects the Olympic Park to five arenas in east London.
The extension completes a £500m upgrade of the Docklands Light Railway, which Transport for London (TfL) says will improve capacity by 50%.
Mayor of London Boris Johnson said: "This expansion of the DLR is a further demonstration of the improvements that the London 2012 Games are making to our city.
"This work will be of permanent benefit for Londoners and all those travelling in the capital from here on in.
"It's fantastic news and another example of London's lasting legacy of playing host to such a momentous event."
Director of transport for the Olympic Delivery Authority, Hugh Sumner, said: "The opening of the new DLR extension is the last piece in the jigsaw for major upgrades and improvements to networks serving the Olympic Park.
"We have worked closely with TfL to fund and deliver a much-improved service which will leave east London better connected after the Games."