Urban Rail Trains segmentation by type distinguishes the primary propulsion architectures that drive system economics and infrastructure requirements. The dominant Electric category, powered through overhead catenary or third‑rail supply, accounts for roughly 70 % of global unit shipments because of its superior energy efficiency, lower operating emissions, and compatibility with dense urban corridors. Diesel‑powered trains, representing about 20 % of the market, remain relevant in regions lacking electrified track, offering flexibility at the cost of higher fuel consumption and stricter environmental regulations. Emerging Hybrid solutions, which combine on‑board energy storage with external electric feed, occupy a niche 5 % share, targeting routes with intermittent electrification and providing transitional decarbonisation pathways. Finally, Hydrogen fuel‑cell units, still under pilot deployment, constitute the remaining 5 % and are evaluated for their zero‑tailpipe emissions and potential to serve off‑grid lines. Each type contributes distinct cost structures, maintenance regimes, and regulatory implications, collectively shaping the overall Urban Rail Trains market size.