On October 1, 2026, the Swiss railway company Les Transports Montreux–Vevey–Riviera (MVR) placed an order with Stadler Rail for two dual-mode electric-diesel rack locomotives, designated HGem 4/4. These locomotives are intended for use in hauling work trains on the Montreux–Rochers-de-Naye railway line. This line is known for its steep inclines and uses an Abt-type rack system, a specialized rail system that allows trains to climb very steep gradients by engaging with a rack rail between the tracks. The line has maximum gradients of 220 ‰, which is equivalent to a 22% incline—far steeper than most standard railway lines. The new locomotives will be built at Stadler's facility in Bussnang and are expected to be delivered in 2029. Each locomotive will have four powered axles and a narrow gauge of 800 mm, making them suitable for the specific track conditions of the Montreux–Rochers-de-Naye line. They will be equipped with a power output of 1320 kW and will have a maximum speed of 25 km/h, which is appropriate for the line’s operational needs and safety requirements. This order is part of a broader modernization plan for the Montreux–Rochers-de-Naye line. In July 2025, MVR had already ordered eight new rack locomotive sets from Stadler, with the commissioning of these units also scheduled for 2029. The modernization plan also includes the installation of the CBTC NOVA Pro signaling system, a state-of-the-art technology that enhances train control and safety by allowing for more precise tracking and communication between trains and control centers. The upgrades aim to improve the efficiency, safety, and reliability of the Montreux–Rochers-de-Naye line, which is a key part of Switzerland’s railway network. These improvements are expected to support continued service on this challenging route, which is popular with tourists and essential for local transportation needs.