Avelia Horizon: The only double-deck high-speed train in the world. Avelia Horizon™, the world's only double-deck train running at over 300 km/h, offers high operational flexibility and guarantees the highest levels of safety and passenger experience, while reducing energy consumption and maintenance costs.

The title of "best" often goes to the Avelia Horizon (TGV M), Alstom's latest high-speed double-decker train used primarily by SNCF in France. It is considered a marvel of engineering because it is the only double-deck train in the world capable of speeds over 320 km/h (200 mph) while offering 35% more passenger capacity and 30% less energy consumption than previous models. For a more "luxury" experience, many travelers point to the Shiki-shima in Japan, which features spectacular double-deck suite cars with floor-to-ceiling windows. In the realm of commuter comfort, the Stadler KISS (used in Switzerland, Austria, and parts of the US) is highly praised for its smooth ride, quiet interiors, and spacious upper-deck views. Whether you value raw speed, eco-efficiency, or panoramic views of the countryside, the modern evolution of the double-decker train has made rail travel more efficient and scenic than ever before.