A third of Londoners must work from home during Olympics to avoid tube chaos. Transport bosses say a third of Londoners will have to work from home during 2012 Olympic games to avoid chronic(持续的) overcrowding on the capital's tubes and buses. Commuters(乘车上下班的人) have been told they can expect waits of over half an hour or more for tubes at some of the busiest stations during the games. And Transport for London(TfL) claims some of the busiest areas such as Canary Wharf will only be able to cope if 60 percent of workers change their travel plans.