The Arm-type Bridge Inspection Vehicle market is first stratified by type, which delineates the mechanical architecture of the vehicle's inspection arm. Three primary sub‑types dominate: Robotic Arm, Telescopic Arm, and Articulated Arm. Robotic Arms, characterized by multi‑axis motorized joints, command roughly 45% of total market revenue because they enable precise, repeatable motions essential for high‑resolution sensor deployment. Telescopic Arms, employing linear extension mechanisms, represent about 35% of the market; their compact stowage and rapid deployment make them attractive for routine inspections on limited‑access bridges. Articulated Arms, featuring segmented linkages with manual or semi‑automatic control, account for the remaining 20%, serving niche projects where cost sensitivity outweighs advanced automation. Each sub‑type contributes distinct cost structures, maintenance cycles, and payload capacities, collectively shaping the overall market size and influencing OEM investment decisions.