When adaptively importing ANM data, random links split to form a small connector and link.
When an intersection is changed, it is necessary to update its geometry. PTV Vissim needs to find a location where the new part of the network is connected to the old part of the network. Therefore, PTV Vissim cuts the links between the new intersection and the old ones very close to the old intersections. This is not random; PTV Vissim tries to save as much of the old network as is possible. For example, items located on the edges next to the updated intersection will generally be restored.