To help athletes, officials, supporters and the media get between the event's locations, the Olympic Delivery Authority is establishing an Olympic Road Network (ORN) and Paralympic Road Network (PRN) for the games. These will feature designated lanes for traffic moving between events, with other traffic facing a £200 fine for using them during the daytime.

The network will include 2.6% of London's roads, but will mostly be made up of the city's most vital routes, and is primarily located in the South East. However, it will stretch as far as Cardiff and Manchester for certain events, with smaller scale revisions to the road network expected.

ACFO director John Pryor told delegates to be prepared for "business as unusual" while the event is taking place between 27 June and 15 September, advising them to plan for disruptions and re-route where possible to avoid delays.

BVRLA chief executive John Lewis warned that the problems could be even more widespread: 'You're also not going to have any street works during that time,' he said. 'Anything that's backed up is going to happen before that period. So look forward to two or three weeks of disruption before that anyway.

'You've also got the aspect of the re-timing of traffic lights. What that means is they're going to double the length of time that traffic lights are green on that route. So when you try to cross it, you're going to get backed up.'

For more information about the ORN and PRN, visit the ODA's website at london2012.com/olympic-route-network.