I have a routing problem that I intend to solve with ArcGIS network analyst. First, Closest facility works perfect for me to find the shortest paths to a number of demands. The results look like the left part of the figure:
For my analysis I would like to compare the left situation with the right one, when it is more cost-efficient to share the route. This far I have just painted the routes in the right part for clarity. In a normal Dijkstra I would just recursively adapt the weights of the links, setting the already chosen to a lower cost. However, I do not know how could I do this in ArcGIS closest facility.
Is there a way to modify the shortest path algorithm in Network analyst?