It may be our newest line, but until recently the signalling on the Jubilee line was far from new. To cope with ever-increasing passenger numbers, especially with the link to Canary Wharf, we needed to upgrade this signalling.
The work required to upgrade the signalling system on the Jubilee line is now complete. This allowed us to increase the frequency of trains from late July 2011 and in March 2012 even more trains were added.
We also increased capacity - or more room to carry more people - by adding a seventh carriage to trains back in 2006.
Fast, frequent service
The new state-of-the-art signalling system, which allows trains to be driven automatically, is in operation across the entire line.
We know the work was disruptive so thanks for bearing with us. Combined with work we've been doing to the tracks, it means faster journeys and a more frequent service.
We've increased the number of trains running in peak hours by a third allowing us to carry an additional 12,500 people an hour.
Journey times have also been cut by around 22 per cent.
One last thing
While the Jubilee line upgrade is now complete, track renewal work and other heavy maintenance to keep the Tube safe and reliable will continue. Closures to sections of the Metropolitan line may on occasion cause additional closures on part of the Jubilee line.
You may have noticed work has started on the upgrade of Bond Street station. Right now, a lot of preparation is going on as we get ready to work on the station, and sometimes this may lead to changes that'll affect your journey. It's a key West End station that will become even more important when Crossrail arrives - with 24 trains an hour in both directions at peak times.
We know it's disruptive but it'll be worth it because by the time it's complete in 2017, the station will have a bigger ticket hall, step-free access from street to platform, and extra escalators to get you moving more quickly.
Green Park is another station where you'll notice a lot going on. There may be some disruption while we carry out the upgrade, but we're doing our best to keep this to a minimum.
Work to create step-free access to all platforms, and between all lines serving the station, has already been completed. The installation of platform humps also provide level access with trains for all three lines.
Another big change is the new, ramped station entrance, providing direct access from Green Park.
There's further work to be done, so please bear with us. We'll try to keep disruptions to a minimum.