Autonomous Bus Door System Market Size, Share & Trends Analysis Report By Bus Type (Shuttle bus, City bus, Intercity bus, Coach, BRT bus), By Door Type (Conventional doors, Folding doors, Sliding plug doors, Coach doors, Inward gliding doors), By Mechanism (Pneumatic, Electric), By Level of Automation (Level 4, Level 5), By Propulsion Type (ICE, Electric), By Component (Hardware, Software, Services) and By Region (North America, Europe, APAC, Middle East and Africa, LATAM) Forecasts, 2026-2034