What is the rectangular or otherwise configured safety zone that surrounds the airport runway, accommodating aircraft that may veer off the runway?

Fire/Rescue personnel consider the to be in all directions along both sides of the runway.

a) Safe Zone, Circular
b) Buffer Zone, Quadrilateral
c) Runway Safety Area, Clear
d) Emergency Zone, Expansive

The safety zone surrounding the airport runway, designed to accommodate aircraft that may veer off, is known as the Runway Safety Area (RSA). It is intended to reduce the risk of damage and provide clear access for emergency services.

Explanation:

The rectangular area or otherwise configured safety zone that surrounds the airport runway, accommodating aircraft that might veer off the runway, is called the Runway Safety Area (RSA). Fire/Rescue personnel consider the RSA to be clear in all directions along both sides of the runway. This area is designed to reduce the risk of damage to airplanes in the event of an undershoot, overshoot, or excursion from the runway, by providing a clear and relatively flat area. The RSA includes protection for people on the ground and property from aircraft that may veer off the runway, as well as providing accessibility for firefighting and rescue equipment during such emergencies.