Communications-Based Train Control: World leading high-capacity signalling
Urbalis CBTC range at a glance
- Shorter headways between trains: maximise your network capacity and throughput
- Lower life-cycle costs
- Fit for migration
- Zero service disruption
Communications‑Based Train Control (CBTC) is a modern, radio‑based signalling system that enables precise, real‑time train localisation and continuous communication between trains and the control system. By replacing conventional fixed‑block signalling with moving‑block or optimised fixed‑block principles, it allows trains to safely run closer together, significantly increasing line capacity, service frequency and punctuality. As cities face growing demand for reliable mass‑transit.
Our scalable solutions provide best‑in‑class automatic train‑control capability across all Grades of Automation (GoA)
From driver‑assisted services to fully driverless operation. Designed for both brownfield and greenfield networks, CBTC has become the global standard for high‑performance metro systems, helping operators expand capacity without compromising on safety or reliability.
Alstom comprehensive CBTC portfolio
We are are the leader in the mass‑transit market and the #1 provider of CBTC technology. Our Urbalis CBTC range fits any network complexity - from conventional metro operations to fully driverless systems - and is deployable on both new lines and existing networks.
We have over 30 years of CBTC expertise, and our Urbalis™ signalling portfolio is already integrated into 190 metro lines worldwide, including 67 driverless lines in 32 countries, moving millions of passengers safely every day.
We are at the forefront of the latest innovations, utilising enhanced onboard intelligence and train‑centric communication to reduce wayside, simplify architecture and increase operational flexibility.
Learn more about the Alstom Urbalis CBTC solution
Trouble-free installation for capacity and cost efficiency
Proven CBTC technology supports optimisation and upgrades with zero service disruption, providing a new dimension in overlay capability. By reducing headways, CBTC enables up to 30% more capacity, for both manned and unattended train operation.
These systems can be deployed quickly, allowing some of the world’s largest cities to meet their transportation needs – rapidly and reliably. This was the objective when doubling capacity on the existing line in Madrid or easing congestion in Delhi by offering alternative routes across the city. Additionally, with the system making greater use of energy saving strategies, consumption can be reduced by up to 30%.
Simplifying signalling
Urbalis Fluence™ takes the CBTC experience a step further by merging interlocking functions into a train-centric architecture. This innovative approach enhances operational efficiency and safety, making it an ideal solution for modern urban transit systems.
Moreover, radio contact between trains enables gaps to be shortened, resulting in even lower headway and 24-hour operational availability. This seamless communication not only improves punctuality and reduces wait times for passengers, but also maximises the overall capacity and efficiency of the transit network.
Global project experience
From Mexico to Italy and Singapore to Canada, clients all over the world testify to Alstom’s project management capabilities in conducting the installation and migration process. Building on valuable return on experience from previous projects, we are today a preferred partner to many transport authorities wishing to revamp and increase the capacities of their urban rail networks.
