TfL said the majority of 6.4 million passengers a day use travelcards or pay-as-you-go Oyster cards, as they offer cheaper fares.
BBC: London bus ticket vending machines may go from 2013
2.
The mayor said Oyster travelcards would be accepted on Crossrail services and a premium fare would be charged on the Heathrow extension.
BBC: NEWS | UK | England | London | Fares 'to rise to fund Crossrail'
3.
At the end of every school year, thousands of school children automatically have their Zip Oyster travelcards cancelled as they move into another age category.