LONDON'S BID team had to overcome initial criticism of the capital's transport infrastructure by the International Olympic Committee to win the vote.
The IOC had expressed concerns about the capacity of the transport system and the need for new investment in safety.
It is thought criticisms were sparked by Paris sympathisers in efforts to undermine London's bid.
Ultimately this gave London a chance to trumpet the huge investment programme already planned for the London ahead of the Games.
The London 2012 team used the IOC evaluation committee's visit to the capital in February to dispel concerns on the Channel Tunnel Rail Link's ability to incorporate a high speed shuttle train service between London St Pancras and Stratford.
It took the team on a trip through the recently completed CTRL tunnels in London to give it confidence that the service would be ready in time for the Games.
London's mayor Ken Livingstone also used his part of London's presentation to the IOC last week to highlight the ú30bn ($56bn) transport spend in London between now and 2011. Some $1.7bn has been committed to the East London Line upgrade.