Yes, the vast majority of "bullet trains," such as the Japanese Shinkansen, the French TGV, and the Chinese CRH, run on specialized, high-precision steel tracks. These tracks are often built on a "ballastless" concrete slab to handle the immense speeds and prevent the shifting that occurs with traditional gravel. However, a new generation of bullet trains known as Maglev (Magnetic Levitation) trains does not use traditional tracks or wheels. Instead, they glide over a "guideway" using powerful electromagnets to hover and propel the train forward, eliminating friction entirely. While Japan is currently building the Chuo Shinkansen Maglev line, most high-speed rail systems in 2026 still rely on the traditional wheel-on-rail interface because it is more compatible with existing infrastructure. So, while they all follow a set path, the physical "track" can vary from steel rails to magnetic concrete channels.