Alstom Delivers First Grand Paris Express Line 18 Trains

The Grand Paris Express Line 18 reaches a major milestone with the arrival of the first Alstom trains at the Palaiseau operations center. This large-scale project, set to revolutionize travel in southern Paris region, now enters its crucial testing phase before the planned service launch in late 2026.

Alstom Unveils Revolutionary Rolling Stock

In September 2021, the Société des grands projets and Île-de-France Mobilités awarded Alstom a €199 million contract for the design, manufacturing, and delivery of Line 18 rolling stock. This exceptional order includes 15 ultra-modern trains, along with driving automation systems and centralized control.

Technical Specifications of New Trains

Each train features impressive technical specifications:

• Configuration: 3 cars per train
• Dimensions: 47 meters length, 2.5 meters width
• Capacity: Up to 350 passengers per train
• Speed: 100 km/h maximum, 65 km/h average operational speed
• Frequency: Minimum 90-second intervals during peak hours

The trains are entirely designed and assembled at the Alstom Valenciennes site, with technical support from five other Alstom sites across France, ensuring 100% French expertise.

Award-Winning Design Endorsed by Parisians

The unique Line 18 design results from close collaboration between Alstom's design bureau, Île-de-France Mobilités, Société des grands projets, and Egis Rail. This innovative conception was awarded the prestigious GOOD DESIGN© Award, international recognition for the most remarkable industrial creations.

"Diamond" Windscreen Innovation

The most distinctive element of these trains lies in their luminous signature around the large "diamond" windscreen. This technical innovation offers exceptional panoramic views at the front of the train while optimizing available passenger space. This futuristic design was endorsed by Parisians during an online public consultation in late 2021.

Maximized Comfort and Accessibility

The interior layout prioritizes comfort and inclusivity:

• Optimized lighting: natural light through large windows, intelligent LED lighting under seats
• Ergonomic seats developed with specialists
• Widened doors and low floor for accessibility
• Dedicated spaces for people with reduced mobility
• Modern equipment: air conditioning, USB ports, real-time information screens

Delivery Schedule and Intensive Testing Phase

The first train was delivered in May 2025, strictly adhering to the established timeline. By the end of 2026, all 15 ordered trains will be received at the Palaiseau operations center. This delivery is strategically organized: ten trains for first section operation, five additional trains for the Orly Airport extension.

Tests Controlled from Palaiseau

All Line 18 tests are coordinated from the centralized command post (PCC) at the Palaiseau operations center, infrastructure completed in spring 2025. Alstom installs equipment supervision systems there and ensures technical test coordination.

The testing program unfolds in two distinct phases:

Static tests (June 2025): Starting with delimitation and electrical power supply of the "red zone" for first rolling tests at the operations center.

Dynamic tests (end 2025): Ten trains will be received to enable progressive rolling across the entire 8.5-kilometer section between Massy-Palaiseau and Christ de Saclay stations.

Progressive Service Launch: 2026-2027

The Line 18 service launch will follow an optimized phasing:

The first Massy-Palaiseau / Christ de Saclay section will open in the fourth quarter of 2026, offering direct connection to Saclay plateau residents, students, and researchers.

The second section to Orly Airport will enter service in late 2027, completing this strategic 33-kilometer connection.

100% Automatic and Ecological Line

Line 18 stands out for its exceptional environmental and technological performance:

Unique Energy Innovation

The metro will be powered by 1,500V through an inverted third rail located on the ground. This technology, unique across the Paris region network, avoids catenary use and enables perfect landscape integration for the aerial section.

Energy optimization relies on braking energy recovery, significantly reducing overall electrical consumption.

Strategic Interconnections

With its 10 new stations, including 3 in aerial sections, Line 18 will create multiple connections with the existing network:

• Metro Line 14 at Orly Airport
• RER B and C for regional connections
• Trams T7 and T12 for local travel
• Train lines N and U

Major Territorial and Economic Impact

This new infrastructure will serve the territories of Antony, Massy, Saclay plateau, Saint-Quentin-en-Yvelines, and Versailles, meeting the travel needs of millions of daily users.

The final system validation before transfer to Keolis, Île-de-France Mobilités' delegate, will constitute the ultimate step before commercial opening. This meticulous coordination ensures optimal reliability and safety for this new Grand Paris Express line.

With its cutting-edge technical performance and award-winning design, Line 18 establishes itself as a model of excellence for future urban transport, combining technological innovation, environmental respect, and user comfort.