I have a network dataset, multiple stations, and a large service area polygon. I want to calculate equal travel area polygons. Basically, I want the large service area to be split into five pieces based on which station services that part best. I tried the Make Service Area Analysis Layer tool, but that unfortunately wasn't quite what I was looking for. I don't want to have to specify times because I don't want time to be the limiting factor. I tried just setting the cutoffs very high, but it just gave me 6 large overlapping polygons. What can I use to create these areas?