Thank you! The roads leaking is only an issue for determining the percentage of state residents within an area, because the regions also include out of state r

Thank you! The roads leaking is only an issue for determining the percentage of state residents within an area, because the regions also include out of state residents. But what you describe is another limitation of my approach. Currently, only Virginia hospitals are considered in this, so some regions will actually have better hospital accessibility than presented here, particularly near state borders. Now that I've polished this setup for one state, my plan is to expand the project to the US (or maybe all of North America), which should fix the issue you describe.