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How is the walking distance in Network Analysis calculated?

Question asked by lenab19_virginiatech on Nov 11, 2019
Latest reply on Nov 11, 2019 by MMorang-esristaff

I am generating service areas with Network Analysis for transit stops (on ArcGIS Pro).

I am using Generate Service Areas tool, and using walking as the travel mode and setting it to 0.25 miles- I want to see what region of area lies within 0.25 of traverse-able walking distance.


I would like to know, how is this walking distance calculated? Does the walking distance account for non-traverse-able areas?


My concern is that the walking distances include buildings, rough terrain, or private areas that a pedestrian cannot walk through to get to the stop - thus the actual walking distance is longer (they have to walk around the building or said private area). 


If it is not calculated, would I need to import a shp file of Buildings for the study region, then import that into the "Polygon Barriers" layer of the service areas layer? If so, then would the walking distance calculated account for the buildings and restrict the paths from them?