sticky jam at short edge

[namdre]

According to traffic theory and simulation practice (with "long" edges), a jam grows on the upstream end and shrinks on the downstream end. In meso, edges that admit only a single vehicle break this behavior and a jam never moves upstream.

This is because the short edge breaks the jam-jam headway that is needed for slowing the inflow into the jammed edge.

[namdre]

surprisingly, the jam is sticky even with an edge length of 22m and only disappears when the edge admits 3 vehicles (22.5m)!