I am trying to map backup service area for a handful of rescue squads/stations. Each station (facility) cannot be a backup in its own primary area. So I need to solve a service area for each facility, and have each facility respect a barrier that only applies to that certain facility. Is there anyway to do this with Network Analyst? I have the primary areas (the facility-specific barriers) mapped out in a polygon layer.
Instead of using barriers, would I be better off using some kind of restriction in the network?