Alstom's remote-controlled trains take first steps toward automation in Munich trials

Alstom has shared new technical details about its Remote Train Operation (RTO) system after early trials at Munich-Steinhausen rail yard. The tests, which began in December 2025, focused on a single Deutsche Bahn S-Bahn model—the Baureihe 423. Despite provisional setups and harsh weather, the company reports positive progress so far.

The system allows trains to be controlled remotely during shunting operations, marking a step toward automated rail processes.

Planning for the project started in October 2023, with modifications to the train beginning that December. Functional demonstrations took place in mid-December and again in late January. So far, only the Baureihe 423 has been retrofitted and tested with Alstom's RTO technology.

To enable remote control, the train required several upgrades. These included extra cameras, microphones, an onboard RTO control unit, network switches, and a NetBox for 5G or Wi-Fi connectivity. The exact placement of these components depends on the train model, though existing ETCS infrastructure may be reused where possible.

Alstom has highlighted key challenges in rolling out RTO. These include maintaining a stable, high-speed wireless connection, meeting regulatory and safety standards, and adapting organisational workflows. The company is now reviewing driver feedback to refine the system further.

The initial tests at Munich-Steinhausen provide a foundation for wider adoption of remote shunting technology. Alstom will continue optimizing the system based on performance data and operator input. If successful, the RTO system could eventually be expanded to other train models and rail networks.