Chevron markings beyond the end of the runway are yellow. They mark an overrun area (blast pad or stopway) that is not intended for landing, takeoff, or taxiing. The yellow color stands out against the runway surface and white runway markings, signaling to pilots that this space is not part of the usable runway. This area is provided for safety and deceleration but isn’t treated as part of the runway for operational purposes.

The main idea here is the safety buffer around the airport perimeter. Canada requires keeping a clear area outside the fence to maintain visibility, security access, and a guard against objects or activities that could threaten the airside. The standard distance is three meters. This creates enough space for security patrols to monitor the boundary, for maintenance work without clutter near the fence, and to reduce the chance of debris or wildlife encroachment entering restricted areas. A buffer of one or two meters would be too tight for reliable visibility and safe operations, while five meters would unnecessarily constrain ground access and is not the mandated standard.

When a paved stopway, blast pad longer than 60 meters, or an arresting system sits beyond a runway end, that area is not part of the usable runway. It must be visually distinguished with chevron markings across the entire length beyond the runway end. These yellow chevrons clearly signal to pilots that the surface is not for landing, takeoff, or rollout, even though it is paved. The uniform use of chevrons helps ensure safe, predictable operations at every airport. Other marking terms like stripes or indicators aren’t used for this purpose, because they don’t convey the same unambiguous message that the area beyond the runway end is not available for normal aircraft operations.

RAIC focuses on who is allowed into restricted airport areas. It ties a person’s identity to a secure credential used to access sensitive zones, so security staff can verify that the person presenting the credential is indeed who they claim to be. This strengthens identity authentication because each entry is checked against a verified identity, credentials can be revoked if needed, and entry events can be logged for audit. The goal is to prevent unauthorized access and reduce impersonation or tailgating. Boarding times, airport revenue, and passenger seating aren’t directly affected by this access-control mechanism, since they relate to operations, finances, and seating Logistics rather than who is allowed into restricted areas.