Description. A displaced threshold is a threshold located at a point on the runway other than the designated beginning of the runway. Displacement of a threshold reduces the length of runway available for landings in this direction only.

What is the landing threshold?

The beginning of that portion of a runway usable for landing. Dictionary of Military and Associated Terms.

What is pre threshold?

Pre-threshold marking is provided where a runway has: a displaced threshold. a stop way. a closed pre-threshold area.