A runway safety area (RSA) or runway end safety area (RESA, if at the end of the runway) is defined as "the surface surrounding the runway prepared or suitable for reducing the risk of damage to airplanes in the event of an undershoot,[1] overshoot, or excursion from the runway."[2]
Past standards called for the RSA to extend only 60m (200 feet) from the ends of the runway. Currently, the international standard ICAO requires a 90m (300 feet) RESA starting from the end of the runway strip (which itself is 60m from the end of the runway), and recommends but not requires a 240m RESA beyond that. In the U.S., the recommended RSA may extend to 500 feet (150 m) in width, and 1,000 feet (300 m) beyond each runway end (according to U.S. Federal Aviation Administration recommendations; 1000 feet is equivalent to the international ICAO-RESA of 240m plus 60m strip). The standard dimensions have increased over time to accommodate larger and faster aircraft, and to improve safety.
- ^ Wragg, David W. (1973). A Dictionary of Aviation (first ed.). Osprey. p. 270. ISBN 9780850451634.
- ^ Federal Aviation Administration. "Runway Safety Area Improvements in the United States" (PDF). Agenda Item 3: Assessment of development of regional air navigation and security infrastructure. Fourteenth Meeting of the CAR/SAM Regional Planning and Implementation Group (GREPECAS/14). International Civil Aviation Organization.