Dual-System Tram Fleet Optimised for Mixed Rail Operations

The introduction of dual-system rolling stock has become essential for rail networks that combine mainline and light rail operations. The Regionaltangente West (RTW) project in Frankfurt RheinMain is one of the most prominent examples, requiring vehicles that can manage multiple platform heights, operate across different infrastructure types and deliver consistent accessibility. The contract awarded to Stadler by Fahrzeugmanagement-Region Frankfurt RheinMain (fahma), a subsidiary of Rhein-Main-Verkehrsverbund (RMV), addresses these needs with a new generation of CITYLINK vehicles engineered specifically for the RTW corridor.

Fleet developed for varying platform heights and barrier-free access
The 27 vehicles are based on Stadler’s established multi-system concept but incorporate new technical adaptations for RTW operations. Each tram measures approximately 50 metres and offers capacity for around 360 passengers. The vehicles provide level boarding at 76 cm and 96 cm platforms used across the Deutsche Bahn network, as well as the 80 cm platform standard defined for RTW stations. This mixed-height accessibility is a key requirement for ensuring uninterrupted, barrier-free travel across the future line.

Delivery schedule aligned with testing and approval processes
The first three vehicles are planned for delivery in autumn 2028 to undergo extensive testing and approval procedures. Full fleet delivery is scheduled to be completed by autumn 2030. RTW’s entry into regular service remains aligned with the timetable change in December 2030, ensuring operational readiness once infrastructure works are finished.

Long-term service agreement ensures lifecycle efficiency
In addition to fleet delivery, the contract includes maintenance, servicing and the supply of spare parts for a period of 30 years. This lifecycle approach supports operational reliability, predictable costs and efficient fleet management. The platform’s suitability for both urban and regional routes allows operators to optimise infrastructure and vehicle utilisation.

Project significance for regional mobility
The vehicle order marks a major milestone in the implementation of the Regionaltangente West, complementing ongoing construction across the line’s core sections. By integrating dual-system vehicles capable of operating seamlessly across different rail networks, the project increases regional connectivity and reduces the need for transfers. The technical requirements—especially those related to accessibility and mixed operation—illustrate why a customised solution was essential.

Consistent engineering approach for mixed operations
Stadler’s experience in multi-system vehicle design enabled the development of adapted CITYLINK units that meet RTW’s specific operational conditions. The focus on interoperability, accessibility and long-term maintainability reflects wider trends in rail transport, where operators increasingly seek vehicles capable of handling complex network interfaces.

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