Our upgrade of the Northern line - the busiest on the Tube network - is well underway.
The work we're doing will make your journeys faster and smoother with a new, high-tech signalling system and control centre.
Fast, frequent service
We know it's not something you see or take much notice of, but new signalling will allow us to run more trains, more often, with fewer failures. By running them more quickly and closer together, it'll mean more room - or capacity - on the line. This is vital as nearly a million people ride the Northern line each day, and numbers are growing.
When the upgrade is complete in 2014, the line capacity will increase by a fifth. This means we can carry the equivalent of an extra 11,000 passengers an hour.
At the same time, journey times will be reduced by 18 per cent.
A lot of preparatory work for the Northern line upgrade has already been done to replace a system that dates back to the 1950s. We've put in new trackside wiring and other equipment, and converted the line's trains so they're ready for the new system. Much of the work has been done at night.
The first phase of this huge project has now been completed with trains already successfully using the new signalling at the top end of the line between High Barnet and West Finchley.
There's still a lot to do to test the new system on the rest of the line and so there will be some weekend closures on parts of the line from time to time.
Edgware branch upgrade works
From early December 2012 through to early 2014, service on the Edgware branch of the line will start up slightly later on some Sundays. This is to allow for more work to be completed on Sunday morning when it is very lightly used.
See links below for detailed information and travel advice.
In addition to the signalling upgrade work, we're also carrying out track renewal - including heavy engineering to replace tracks and sleepers, which will result in smoother, quieter and more reliable journeys.
At peak times, Bank is one of the most congested stations on the Underground. It's also a complex one as it's interlinked with nearby Monument.
To help remove some of the bottlenecks, we're refurbishing or replacing all of its 15 escalators. We'll also be introducing a one-way system in parts of the station, which should help ease congestion while the work's being done.
We aim to keep Bank open throughout the works, but it's a big, complex project, so please bear with us.
This station sees more passengers a year than Heathrow Airport. In 2010, we completed a massive redevelopment of King's Cross St. Pancras that quadrupled the size of this key station.
King's Cross St. Pancras is now modern and spacious, has step-free access to all lines, and is less congested thanks to new ways to enter and exit the station.
Tottenham Court Road station
If you've visited Tottenham Court Road lately, you may have noticed that one of the Central line's busiest stations, is being re-built. It's a really exciting project that'll change the way the station and the area around it is used.
By the time it's complete in 2016, the station will have a new ticket hall, step-free access to the platforms, and a pedestrianised plaza outside the station.
It will also be an interchange station for Crossrail, with 24 trains an hour expected to pass through the station each way during peak periods.
There's a lot of work to be done at the station, so please bear with us. We'll try to keep disruptions to a minimum.