They will have walk-through carriages similar to the new Metropolitan, District and Circle line trains.
However, the RMT union said it was "deeply concerned" the trains will have the capacity to be driverless. LU said they would initially be operated.
General secretary of the union, Mick Cash, said: "RMT has made it clear repeatedly that any moves towards the lethal and cash driven nonsense of removing drivers on London Underground would be resisted through the most robust industrial and political campaign of opposition."
https://www.youtube.com/watch?feature=player_embedded&v=Z3Q0FZUKHkY
A spokesman for Transport for London (TfL) said no driver would lose their job, adding that if a decision was made to go driverless, it would be phased in.
Finn Brennan from Aslef, the train drivers' union, said they would always oppose automated trains because the single-track, Victorian infrastructure was designed to be negotiated by drivers.
Currently, the Docklands Light Railway service operates driverless trains but its infrastructure only dates back to the 1980s.
'Improved' capacity
For the first time on deep-level sections of the Tube, the trains will have a mechanised air-cooling system built in.
They will also have improved accessibility, with step-free access from the platform and more space for wheelchair users.
London Underground said the trains would improve capacity by:
- The Central line by 25% (the equivalent of up to 12,000 customers per hour)
- The Bakerloo line by 25% (the equivalent of up to 8,000 customers per hour)
- The Waterloo & City line by 50% (the equivalent of up to 9,000 customers per hour)
- The Piccadilly line by 60% (the equivalent of up to 19,000 customers per hour)
It is hoped that the trains will remain in service for more than 40 years.
The Mayor of London, Boris Johnson, said: "From Greenford to Gants Hill, from Alperton to Arnos Grove, they will ferry millions of people across our city, more comfortably, reliably and stylishly than ever before."
-bbc
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