Both commuters and tourists can struggle with the layout of the London tube map but a new circular design could end their travel woes.
A look back at some of the stops on London Underground's 150 year journey.
The first steam train to carry Tube passengers for over 100 years did a test run for the Tube's 150th anniversary celebrations in 2013.
Transport for London is reporting that there are minor delays on the Northern Line between Camden Town and High Barnet, but commuters have been complaining of long queues to get into a station or on a train.
Minor delays if you're on the northern line. Major delays if you're still trying to get on it.From @iamseb on Twitter:
There are delays on the Northern Line between Camden Town and High Barnet due to an earlier signal failure at Clapham Common.
London Underground's operational development and upgrades director, Nigel Holness, said he was disappointed at the threat of industrial action over new trains.
He said good progress had been made in talks with the RMT on Wednesday and a further meeting was planned today.
– Nigel Holness, London Underground
"I would urge the RMT to work with us to bring about these improvements and remove the completely unnecessary threat of pointless disruption from hanging over our customers,"
On the Piccadilly line ballot, Phil O'Hare, LU's Piccadilly line manager, said he was hopeful the issues with the RMT could be resolved.
He said there had been two "very positive meetings" with the union, and management was "due to meet with the union's regional organiser next week to finalise an agreement".
RMT general secretary Bob Crow said:
"The outcome of these separate ballots will now be considered by RMT's executive but the message could not be clearer - we are stepping up the fight to protect agreements, jobs and working conditions across the whole of London and to eliminate the scourge of poverty pay on cleaning contracts."
The RMT union has announced that Tube drivers on the Piccadilly Line will strike in a row over working conditions.
Tube cleaners and some engineers working for Transport for London will also walk out in separate disputes.
Drivers on Tube lines serving the Hammersmith and City, Metropolitan and Circle Lines voted for industrial action, short of a strike.
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?
In 2013 there will be five closures in which tunnel works will be carried out, although in all but one of these other essential work will be carried out at the same time. These include:
- Sunday 16 June and Sunday 6 October
- Bank holiday Monday 26 August
- One fullweekend: 12 and 13 October
- Christmas period: 25-30 December
- There will also be late start up at 11.00hrs onthree Sundays
In 2014 there will be nine closures when tunnel works take place, although only four are solely for tunnel works:
- Sundays: 12 January, 15 June, 17 August, 16November
- two full weekends: 1 and 2 February, 8 and 9March
- Saturday 1 March
- A five-day closure at Easter: 18-21 April
- A six-day closure at Christmas: 25-30 December
- There will be 17 late starts on Sundays in 2014
In 2015 some additional closures may be necessary to complete the work.
London Underground's Jubilee, Northern and Piccadilly lines' programme director Stuart Harvey said today:
"All railways require a programme of maintenance and we will soon be carrying out work on the tunnel lining on a section of the Jubilee line.
This is part of ongoing maintenance and, due to the nature of the work, some closures during weekends will unfortunately be required between Finchley Road and Waterloo."
He went on: " We will be doing as much of the work as possible overnight; however, in some cases we need to carry on beyond normal overnight engineering hours and normal weekend services will not be able to operate.
I apologise to customers for the disruption. We'll be keeping the impact to a minimum by spreading the work out and including some later-starting services on Sunday mornings to minimise the overall number of closures."
The work - to the tunnel lining on the Jubilee line between Finchley Road and Waterloo - includes six-day closures of stations during Christmas 2013 and Christmas 2014. There will also be a closure of the section over Easter 2014.
The work covers a number of weekends and bank holiday periods from June this year to the end of 2014, with the possibility of some additional closures in 2015 in order to complete the maintenance.