The purchase of modern KISS multiple-unit trains has opened a new chapter in Hungarian rail transport. These high-capacity, double-decker trains offer fast, comfortable and environmentally friendly travel, especially on suburban and tourist routes. The developments focused on improving the passenger experience and supporting sustainable mobility. The 21 modern, high-capacity KISS trains, purchased with European Union co-financing under two separate projects, provide a comfortable alternative both for daily commuting and for longer regional journeys. Operating on