Stadler, the Swiss rail rolling stock manufacturer, is set to unveil its innovative prototype RS Zero at the InnoTrans trade fair in Berlin. The RS Zero, designed as the successor to the longstanding RS1 Regio-Shuttle, features hydrogen fuel cells and battery packs instead of traditional diesel engines, marking a significant step towards sustainable transportation. With a focus on reducing carbon footprint, this new rail bus addresses the challenge posed by non-electrified railway lines, a prevalent issue not only in Germany but across Europe. Stadler emphasizes the adaptability of the RS Zero to different railway line features, offering solutions for both electrified lines with charging stations and those powered by hydrogen refueling stations. This flexibility is crucial for providing economically viable transport services, particularly on secondary routes with limited traffic. The RS Zero boasts impressive specifications, including the capacity to seat between 70 and 150 passengers, a low axle load of under 18 tonnes, and a design that incorporates renewable and recycled materials, exemplified by the use of PET bottles in construction. By aligning with sustainable design principles and technological innovation, Stadler aims to contribute to the ongoing transport transition. While previous hydrogen rail buses faced operational challenges, such as defects in the Coradia iLint trains and a shortage of skilled drivers, Stadler's approach with the RS Zero signals a positive shift in the industry. By addressing past issues and focusing on delivering a reliable and efficient rail bus, Stadler aims to attract customers back to sustainable public transport options.