Will commuters change for Games?
The capital's transport system will face a huge test when the Olympic Games begin next Friday.
People have been told to plan ahead, and think of alternative ways of getting to and from work.
To monitor this, BBC London will be following four Londoners over the course of the Games, to see how the Olympics will affect them and their journeys.
Researchers from University College London will then analyse the GPS data.
The four Olympic commuters are:
Keith Grainger - Driver
Keith works as an administrator at University College London on Tottenham Court Road and he drives to work from Woolwich in south-east London. He uses a wheelchair which means using a car is the only way that he can get to work in the mornings.
Usually, he leaves the house at about 07:45 BST and his journey typically lasts 90 minutes. He is concerned that during the Olympics some spectators may be tempted to drive part of the journey rather than using public transport which could cause unnecessary congestion for commuters.
Charlie Duff - Cyclist
Charlie, who is a social media manager, chooses to cycle to work from east London to Waterloo. She completes triathlons in her spare time and so riding to work is useful exercise.
She is concerned about the large number of extra cyclists and road users during the Games, who could delay her commute and perhaps cause accidents because they are not used to cycling in London. Her journey usually takes 30 minutes.
Julie Coackley - London Underground
Julie gets the Tube at Bow Road, changes at Mile End for the Central Line before getting off at Notting Hill Gate and walking to her nursery where she works as a manager.
Because parents often drop their children off before work, it is essential that she is at work on time.
As she has to change at Mile End, which has been identified as an Olympic hotspot, she is concerned she could be delayed by large numbers of spectators heading to the Olympic Park. Julie's journey usually takes just under an hour.
Anna Lines - Bus
Anna lives in Maida Vale and catches the number 19 bus to Victoria where she works. Her journey lasts about 40 minutes but quite often it is interrupted by traffic jams on the Edgware Road.
It is often difficult to get a seat but she prefers travelling by bus rather than the Tube as it is less claustrophobic. She wonders if Transport for London has done enough planning to ensure Londoners are not affected too much on their journeys to and from work during the Games.
Anna's journey usually takes 45 minutes.