Quick answer
Protection uses routed road miles and estimated drive time. Straight-line distance can miss divided roads, bridges, gates, dead ends, and indirect access.
How the signal works
Distance sets remote gates above 5 and 7 road miles. At shorter distances, time buckets determine the base value.
Limits and next step
Routing estimates describe modeled access, not live emergency response. Enter a US street address to test its road connection.