I'm struggling to find a good way to do this in Pro but I'm sure there's a solution...
I have a parcel layer, a streets layer, and an Evacuation Routes layer. I'm trying to figure out which parcels have only one way to get to an Evacuation Route.
Here's a high-level overview of how we usually approach this analysis :
- Use Feature Vertices to Point on the streets layer with "Dangling vertices" to identify dead ends.
- Select by Location to select all parcels within 50 feet of one of these vertices.
- Manually review all parcels to ensure that the selection includes only parcels that have one entrance/exit to an Evacuation Route.
I have used Network Analyst / Network Dataset to create a Closest Facility analysis layer, which gives me the distance from the parcel to the closest intersection with an Evacuation Route. However, now I need to know how many ways there are to get there from each parcel.
This feels like it should be trivial for Pro to create, but I cannot figure out how. Ideas welcome!
[ETA: I did find this previous support post asking about multiple routes between two points, but it doesn't contain a solution. I did try using the output of the first Closest Facility Routes layer as a line barrier for a second Closest Facility, but the results were... inexplicable.]
[ETA2: I've realized that Routes Analysis Layer that the Closest Facility generates will contain this data - when looking for the shortest route, all routes must be compared. Is there any way to have the number of routes found added as an Output Field?]
