Segmentation by application isolates the functional contexts in which hydrogen‑powered city buses are deployed, revealing distinct demand drivers within the broader market. The dominant segment, public‑transport networks, encompasses municipal routes, arterial corridors, and high‑frequency services; its scale reflects policy mandates for zero‑emission public mobility and accounts for roughly 68 % of total sales, making it the primary growth engine. Shuttle services—airport connectors, campus circulators, and corporate park shuttles—require modest passenger capacity but demand rapid turnaround and low‑noise operation; these factors translate into a 22 % share of the market and stimulate specialized bus designs with shorter wheelbases. Tourist and leisure routes, often operating in heritage or low‑traffic zones, prioritize quiet operation and environmental branding, contributing the remaining 10 % of deployments. This application‑centric view, captured in the accompanying pie chart, clarifies how each use‑case allocates investment, influences fleet composition, and ultimately determines the aggregate market size for hydrogen‑powered city buses.