‘Clearway’ means, for turbine engine powered aeroplanes certificated after August 29, 1959, an area beyond the runway, not less than 152 m (500 ft) wide, centrally located about the extended centreline of the runway, and under the control of the airport authorities. The clearway is expressed in terms of a clearway plane, extending from the end of the runway with an upward slope not exceeding 1·25%, above which no object or terrain protrudes. However, threshold lights may protrude above the plane if their height above the end of the runway is 0·66 m (26 ins) or less and if they are located to each side of the runway.
ICAO Annex 14
Chapter 1. General
Clearway. A defined rectangular area on the ground or water under the control of the appropriate authority, selected or prepared as a suitable area over which an aeroplane may make a portion of its initial climb to a specified height.
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