Due to their higher capacity, the four new multiple-unit trains, together with the six new multiple-unit trains already under construction, will help to cope with the expected medium-term increase in passengers. The additional vehicles are identical to the first six vehicles. The series will therefore comprise a total of ten identical vehicles.

Production of the additional vehicles is to take place uninterrupted directly after production of the first six vehicles. The first six new multiple-unit trains are scheduled to enter service in the fourth quarter of 2025, in time for the 2025/2026 winter season. The additional four multiple-unit trains now ordered are to be delivered immediately afterwards, i.e. in the first half of 2026.

The new ABeh 4/8 trains are being developed and supplied by Stadler Bussnang AG. They will have 140 seats each – when used in double traction, 280 seats will therefore be available. Generous multi-functional compartments for skis and snowboards, bicycles or pushchairs will be installed on both sides of the entrances, which, together with the wide low-floor entrances, will enable rapid boarding and alighting.

The total cost for the procurement of the four additional ABeh 4/8 trains is 38.6 million Swiss francs.

Park+Ride Matten – additional trains

Thanks to the new stop and the Park+Ride Matten near Interlaken, the BOB has an important role to play in making the two Lütschinen valleys accessible by public transport. Since the opening in December 2023, additional trains have been running in the direction in demand at peak times on days with high passenger volumes.

From the 2025/2026 winter season, the additional trains can be equipped with the new rolling stock, doubling the capacity of the additional trains. In the medium term, a seasonal quarter-hourly service in the direction in demand is planned. This ensures convenient connections with public transport. The roads in the Lütschinen valleys will be further relieved of private car traffic, further helped by the parking guidance system that has been in place since December 2022. The implementation of the infrastructure renewal projects between Zweilütschinen and Grindelwald is necessary for the optimal realisation of a seasonal quarter-hourly service in the direction in demand.

Exclusively low-floor carriages in future 

Once the procurement is complete, the BOB will be able to operate exclusively with modern trains with low-floor entrances. The high-floor rolling stock from the 1970s and 1980s will be scrapped or sold.