The mayor of London, Boris Johnson, has announced that signalling upgrades on the Jubilee line will be completed this spring.
The new state of the art automatic signalling system is now in use on much of the Jubilee line, with all Jubilee line trains using the system during passenger service.
The project was originally due to be completed by the end of 2009 by PPP contractor Tube Lines. When Transport for London (TfL) acquired the company in June 2010, the project was well behind schedule but London Underground has said it has been working hard to complete the upgrade.
The new signalling system already operates between Stratford and Dollis Hill, work is underway to extend its operation across the whole line, to Stanmore.
Capacity will be boosted by 33% - the equivalent of carrying around 5,000 extra passengers each hour - and journey times will also be reduced by 22%.
Mayor of London Boris Johnson said: “Parts of our tube network date back to the 19th century and upgrading it is vital to ensure our capital can continue to cope with ever increasing demands on public transport and maintain our role as the engine of the UK economy.”
“Work has been progressing swiftly since TfL took control of Tube Lines and we can now see real milestones being reached, including the long awaited completion of this crucial upgrade in just a few months time.”
London Underground managing director Mike Brown added: “This major milestone represents one of the first fruits of TfL taking direct control of the Tube upgrades after the failure of the PPP system to deliver.
“We inherited a Jubilee line upgrade that had been frustrating and painful for passengers and businesses, and we have been working around the clock to complete the work as quickly as possible.
“A successful conclusion is now in sight - with the upgrade on track for completion in the spring of this year.”