Threshold Node
A threshold node is a place that becomes a readable civic node because it repeatedly hosts relational convergence, transition, and public field reinforcement.
Definition
A threshold node is a place where civic field becomes especially legible because convergence happens there repeatedly.
It is not merely a location. It is a transition-bearing place: an entrance, crossing, waiting zone, meeting edge, shared passage, station threshold, library threshold, clinic transition point, or other civic site where repeated co-presence gathers into recognizable public continuity.
A threshold node emerges when a place repeatedly hosts enough passage, return, overlap, or relational reinforcement to become a stable civic reference point.
It is therefore a civic node produced by repetition, convergence, and field memory rather than by formal designation alone.