I've used osm2pgrouting to import a small area, and have been running pgRouting's driving_distance() function simply using length as the cost, but now I'd like to compute custom costs that take into account things like maxspeed, surface, etc. The simplest example is doing least-time rather than least-distance by using length/maxspeed. I haven't been able to find any examples that show how to do this, and would greatly appreciate working code or pointers to docs I may have missed. Thanks, -Josh
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