METRO Magazine Logo
MenuMENU
SearchSEARCH

TfL completes biggest test of new Tube signaling system

Work to transform the world's oldest metro into one of the most modern is now well underway, and once complete it will improve reliability and boost capacity on 40% of the Tube network.

March 27, 2018
TfL completes biggest test of new Tube signaling system

The new system will be introduced progressively over 14 sections across the network, each improving reliability as it is introduced.

TfL

3 min to read


The new system will be introduced progressively over 14 sections across the network, each improving reliability as it is introduced. TfL

Transport for London (TfL) expanded testing of its new, modern Tube signaling system, which is set to transform the Circle, District, Hammersmith & City, and Metropolitan lines, to its largest area yet. The new system was successfully tested from Hammersmith through to Euston Square and Paddington, with the work involving the complex Baker Street junction — the first such junction to be tested with the state-of-the-art Thales communications-based train control (CBTC) system.

Work to transform the world's oldest metro into one of the most modern is now well underway, and once complete it will improve reliability and boost capacity on 40% of the Tube network. The section between Hammersmith and Edgware Road will be the first to go live on the new system this summer, and will provide better, more accurate real-time customer information and improve reliability. The testing over the weekend was conducted from the brand new control room at Hammersmith Service Control Centre, which will also begin operation this summer.

Ad Loading...

The new system will be introduced progressively over 14 sections across the network, each improving reliability as it is introduced. Customers will benefit from quicker, more frequent services from 2021, with all four lines using the new system by 2023. The new, modern signaling will allow trains to run closer together, which will increase the frequency of train services across these lines with 32 trains per hour set to operate in the central London section. This will boost capacity by a third across all four lines — equivalent to space for an extra 36,500 customers during the busiest times of day.

This weekend's testing, which was the culmination of an extensive period of planning and preparation, allowed TfL to gather information to ensure the system is ready for safe and efficient passenger service later this year. The next stage of the testing work will involve the longer, eight-car S-stock trains used on the Metropolitan line for the first time, and further testing and validation will be conducted in the coming weeks and months.

“It's great news that we have been able to start testing on the next section of the network. It shows that our Four Lines Modernization Project is now moving at pace and our customers will be able to see the benefits of this huge program soon,” said Mark Wild, managing director of London Underground. “This project will make an enormous difference to the journeys of tens of thousands of Londoners and will help us to deliver the Mayor's vision for a greener, healthier city by making those journeys quicker and boosting capacity.'

The junction at Baker Street is one of four complex junctions on the lines being modernized, with track for the Circle, Hammersmith & City and Metropolitan lines all running through the station. Ensuring that the new signals can effectively operate in such a busy location is a crucial step for the project ahead of work at other junctions such as Earl's Court and Aldgate

More Rail

Graphic from Amtrak promoting the B&P Tunnel Replacement and Frederick Douglass Tunnel project, featuring the Amtrak logo, project title and an illustration of a high-speed train near the West Baltimore MARC Station.
Railby News/Media ReleaseMarch 17, 2026

Amtrak Announces Community Grants for Projects Near Baltimore’s New Frederick Douglass Tunnel

Amtrak will open grant applications March 23 for community projects near the Frederick Douglass Tunnel alignment in Baltimore as part of a $50 million investment tied to the B&P Tunnel Replacement Program.

Read More →
Amtrak train with logo
Railby StaffMarch 16, 2026

Amtrak Marks Restoration of Two South Carolina Stations

The Denmark Station $2.3 million construction investment project includes a new 280-foot concrete boarding platform, built eight inches above the top of rail, for improved accessibility for passengers with disabilities and families with small children and much more.

Read More →
A view looking down the rail across the new Portal North Bridge.
Railby Staff and News ReportsMarch 13, 2026

NJ Transit, Amtrak Prepare to Open First Track on New Portal North Bridge

The new bridge will begin carrying passenger trains on March 16, replacing a 116-year-old swing bridge that has long caused delays.

Read More →
Ad Loading...
Caltrain trains on tracks
Railby StaffMarch 6, 2026

Caltrain Adopts Corridor-Wide Right-of-Way Safety Strategy

Caltrain and its partners have implemented safety improvements at specific locations in response to known risk conditions, operational needs, and available funding since the agency’s founding.

Read More →
A photo of rail tracks in Ottawa, Canada

Building a National Framework for Transit Safety and Consistency

On a recent episode of METROspectives, METRO Magazine’s Executive Editor Alex Roman sat down with Ana-Maria Tomlinson, Director of Strategic & Cross-Sector Programs at the CSA Group, to explore a bold initiative aimed at addressing those challenges: the development of a National Code for Transit and Passenger Rail Systems in Canada.

Read More →
Stairs in a New York rail station with text reading "USDOT Invests $686 Million to Modernize Aging Rail Stations."
Railby StaffMarch 2, 2026

FTA Invests $686M to Modernize Aging Rail Stations

Competitive FTA grants will support accessibility upgrades, family-friendly improvements, and cost-efficient capital projects at some of the nation’s oldest and busiest transit hubs.

Read More →
Ad Loading...
A purple MBTA train at a Mansfield Station platform.
Railby StaffFebruary 27, 2026

MBTA Updates Rail Modernization Plan to Expand Reliability and Accessibility

The strategy outlines near- and long-term upgrades to ease congestion, support housing growth, and advance statewide climate goals.

Read More →
LA Metro underground station with vehicle
Railby StaffFebruary 27, 2026

LA Metro Sets D Line Subway Extension Launch Date

The 3.92-mile addition will soon take riders west beyond its current Wilshire and Western station in Koreatown, continuing under Wilshire Boulevard through neighborhoods and communities including Hancock Park, Windsor Square, the Fairfax District, and Carthay Circle into Beverly Hills.

Read More →
MBTA railcars
Railby StaffFebruary 26, 2026

Boston's MBTA Marks Progress in Regional Rail Modernization

The procurement advances the agency's broader efforts to modernize its rail fleet and position Regional Rail for long-term improvement.

Read More →
Ad Loading...
An Amtrak Acela
Railby StaffFebruary 26, 2026

Amtrak Sets New Course for Long-Distance Fleet Renewal

Under the plan, all long-distance routes will transition to a universal single-level fleet, replacing today’s mix of bi-level and single-level equipment.

Read More →