Caroline Pidgeon, Leader of the Liberal Democrats on the London Assembly says spreading the closures over such a long period of time is more disruptive to passengers.
What do you think? Join us on Facebook and let us know how you'd prefer Transport for London plan closures like these. Does spreading the maintenance over 18 months work for you? Or would you prefer all the closures to happen at once?
More top news
Kevin Davis, 53, ran a medical company and helped to treat a 15-year-old who had taken a drugs overdose despite not having qualifications.
Daniel Kaluuya is up against the likes of Daniel Day Lewis, Gary Oldman and Denzel Washington for Best Actor at the Oscars.
The 'Theatres at Risk' register lists venues across the country that are most likely to be lost and calls for local authorities to intervene