Stadler has delivered the final double-deck InterRegio train to Swiss Federal Railways (SBB), completing the vehicle handover programme covered by the operator's fleet order with the Swiss rolling stock manufacturer.

The delivery closes out a build and handover sequence that has equipped SBB's InterRegio services with additional double-deck stock, the train type Swiss operators rely on to move high passenger volumes on medium-distance interurban routes without lengthening platforms or adding train paths.

SBB operates one of Europe's most intensively used medium-distance networks, and double-deck vehicles are central to its capacity strategy: each trainset carries substantially more seated passengers per path than a single-deck equivalent on the same infrastructure. InterRegio services sit between regional and long-distance products, linking secondary cities and trunk corridors at higher average speeds than stopping services.

Stadler, headquartered in Bussnang, has built its position in the Swiss and wider European market substantially on regional and double-deck rolling stock, and SBB remains one of its anchor customers. Final deliveries of this kind typically mark the transition from manufacturing and commissioning into full-service operation, with the fleet then entering the warranty and maintenance phase agreed in the original contract.

For SBB, a completed delivery removes the operational constraints that come with running a part-delivered fleet — mixed formations, substitute vehicles and revised diagrams — and allows the operator to plan the full InterRegio timetable around the completed stock.

The handover also frees Stadler's production slots for subsequent orders. Swiss operators continue to renew and expand fleets across regional, InterRegio and long-distance segments, and manufacturers with delivered, in-service reference fleets are positioned for follow-on tenders.

SBB will now run the completed double-deck InterRegio fleet in regular service across its network, with maintenance and availability performance over the coming years determining the fleet's long-term contribution to the operator's capacity targets.