ATC AP Characteristics Practice Test 2026 - Free Practice Questions and Study Guide

Capacity potential is shaped by both operational and physical constraints. After considering how efficiently the airspace can be used to move traffic, the next practical constraint is whether there is physical space to add or reconfigure infrastructure. Land availability determines if you can build additional runways, terminals, taxiways, or other facilities needed to increase capacity. Without sufficient land, improvements to procedures or airspace management can’t yield greater capacity, no matter how well you optimize the flows.

Airspace use is a major driver because it covers how traffic is managed and sequenced, but that factor typically comes first in the assessment. Topography imposes fixed terrain limits that can constrain layout and expansion, and environmental impacts affect feasibility and mitigation requirements, but these are generally considered after establishing whether there is enough land to support expansion.