The Type dimension of Airport Design segmentation distinguishes four primary design categories: Terminal Design, Runway and Apron Design, Air Traffic Control (ATC) Facility Design, and Ground Support Infrastructure. Terminal Design encompasses passenger flow optimization, retail layout, and baggage handling systems, representing the largest share of design spend due to its direct impact on revenue generation. Runway and Apron Design focuses on pavement engineering, lighting, and drainage, contributing a substantial portion of capital outlays because of strict safety regulations and high construction costs. ATC Facility Design includes control towers, radar installations, and communication networks, a niche but critical segment that drives specialized engineering services. Ground Support Infrastructure covers vehicular circulation, fuel farms, and maintenance hangars, adding incremental value by enabling operational efficiency. Collectively, these sub‑types define the structural composition of the Airport Design market, each adding distinct cost drivers that aggregate into the total market size.