Nicole, I do want the polygons to be generated, much like a multiple ring buffer around each facility (school/library) but obviously which follow the road network. I believe my problems stem from the connectivity of the roads which I'm using. I was kind of wondering if anyone else in Maine or someone using Maine data has either run a similar analysis and/or run into similar issues. I've been using the MEDOT public road layer because it has speed limit attributes for each segment of road but was told by my professor that the e911 layer might be better to use even if "speed limit" is only designated by a "priority" field which goes from 1-6. So while I may end up having to use the e911 layer, it doesn't offer as much precision or complexity as does the MEDOT layer. Your suggestion with the two fields was helpful and definitely will save me an extra step every time I need to rebuild the network, so thanks!
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