Hi everyone,
I'm working on configuring our ArcGIS Network Analyst model to support Closest Facility analysis for our 911 dispatch system, which is driven by CAD/AVL data.
I've run into a consistent issue: sometimes the closest recommended unit is actually not the fastest unit because the routing model doesn't accurately reflect how fire apparatuses handle one-way restrictions.
There are situations when fire trucks can legally and safely maneuver against the flow of traffic on certain one-way streets (or access them via unique routes like driveways/alleys) when responding to an emergency.
Currently, if a one-way street provides the geographically closest path to an incident, my Network Analyst solver is ignoring it for the unit approaching from the wrong direction, leading to a detour and an incorrect "closest unit" recommendation.
What is the most effective and robust method within Network Analyst to model this exemption?
Specifically, how can I configure a Cost Attribute or Restriction Attribute to effectively ignore one-way restrictions so that the true fastest route is calculated for the closest unit recommendation?
Any advice on solving this common challenge in fire/EMS/Police service modeling would be greatly appreciated!
I would love to hear how others have configured their restrictions/costs/attributes for their CAD systems
Thank you!
