All trains on the London Underground should be driverless, according to the Conservative group on the London Assembly.
In a proposal to the mayor, the Tories claim it would save about £141m-a-year in wages and prevent strike action.
London Mayor Boris Johnson, the London Assembly Conservatives say: "Driverless trains offer a safer, faster, more efficient level of service," the memo states.
"The Victoria and Central lines already use technology which has reduced train drivers to door openers.
"Current upgrade work will extend this to the Jubilee, Northern, Piccadilly, District, Circle, Hammersmith and City and Metropolitan Lines.
But Bob Crow, general Secretary of the Rail, Maritime and Transport union - the biggest union on the Underground - said: "It is badly thought out, safety has not been thought out.
"We are taking it very seriously and it will be resisted"
"What will happen in a terrorist attack, a derailment or a massive signal failure, is you could have 600 or 700 people trapped down the Tube with no driver - there would be utmost panic."
