A displaced threshold or DTHR is a runway threshold located at a point other than the physical beginning or end of the runway. The displaced portion of the runway may be used for takeoff but not for landing. After landing at the other end, the landing aircraft may use the displaced portion of the runway for roll out.

What is the purpose of a displaced threshold?

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.

What is relocated runway threshold?

An area preceding the runway arrows unusable for takeoff or landing. Relocated thresholds are frequently used temporarily during airport construction and/or maintenance. The tight chevrons in yellow prior to the displacement are a Relocated Threshold.