Skip to main content

Leading the way to greener and smarter mobility, worldwide.

Our ambition is to accompany all transportation stakeholders in meeting tomorrow’s mobility challenges. We strive to provide them with the most efficient and digital mobility systems, while further improving the environmental friendliness of our solutions. 

Smart innovation for sustainable mobility

Follow us on

A comprehensive portfolio of mobility solutions

We offer a complete range of equipment and services, from high-speed trains, metros, trams and e-buses to integrated systems, customised services, infrastructure, signalling and digital mobility solutions.

Discover our solutions

Follow us on


Find the latest Alstom press releases and news, press kits, your regional press contacts and more!

Enter the newsroom

Follow us on

The one stop shop for all relevant information for investors and shareholders

Access our financial & share information, our financial calendar and results, regulated information, shareholders' meetings and investors' contacts & presentations.

See more

Follow us on

You know we make trains move. Discover how we move the world.

At Alstom, we value curious and innovative people who are passionate about working together to reinvent mobility, making it smarter and more sustainable. We are building an agile, inclusive, and responsible culture, where diverse people are offered opportunities to learn, grow and advance in their careers, with options across functions and geographies.

Learn more

Alstom launches Atlas 400 and 500, the first scalable ERTMS solutions

Press Contacts

Visit our media section and follow the link "Press contacts"


Alstom launches Atlas 400 and 500 to offer scalable ERTMS for traffic density from 6 to 600 trains per day, whether on passenger, freight or mixed traffic lines. The solutions have been presented at InnoTrans, the biggest railway tradeshow in the world which takes place in Berlin from 23-26 September. They are applicable for a resignalling upgrade or a new-build project. The scalability or configurable deployment in accordance with customer needs is achieved with modular software applicable to the same onboard and trackside computer equipment.

Both Atlas 400 and 500 are based on Alstoms proven Atlas 200 system and take into account customer feedback. 

Atlas 400 has been specifically designed for low density lines. With Atlas 400, train detection is performed by the trains themselves, which reduces the need for trackside equipment, providing investment savings from 12% to 16% and up to 30% on maintenance cost. It is designed to be operated with satellite positioning and various radio bearers.

Atlas 500 has been designed for high density lines and increases headway performance by up to 25% for customers. Trains can follow each other very closely thanks to the accurate braking curve. It also reduces the time for station stops. Atlas 500 combines ATO [1]  and moving block functionalities without adding extra equipment and so does not increase the cost of ownership. Furthermore, Atlas 500 uses GPRS which allows communication with more trains in dense traffic areas.

Thanks to Alstoms ERTMS range of solutions, trains will now be able to run easily between low density and high density zones. On low density lines, Atlas 400 will offer customers minimum operating and capital expenses while maintaining safety. On high density lines, Atlas 500 will provide cab signalling, train localisation and train protection through a single piece of radio equipment says Pascal Cléré, Senior Vice President, Transport Information Solutions, Alstom Transport. 

Banedanmark the national Danish operator- has already chosen these solutions for its network. Alstom and Banedanmark teams are jointly working in Copenhagen, in cooperation with Alstom site of Charleroi (Belgium) which has already delivered similar equipment in Italy, Belgium and the Netherlands.23 countries have already chosen Atlas solution and 4,600 trains are being equipped with the technology.

[1] Automatic train operation