ArcGIS 3.0.2: How does the “service area” of the “network dataset” behave when the facility has no close roads network?

[JamalNUMAN]

ArcGIS 3.0.2: How does the “service area” of the “network dataset” behave when the facility has no close roads network?

For example, in the network dataset shown in screenshots below, I couldn’t figure out how the “service area” of the “network dataset” behaves while the nearest roads network to the facility is more than 500 meters. Then how the coverage areas of 800, 3000, and 5000 are determined? How the distance is calculated from the facility to the roads particularly where there is no roads network?

[MelindaMorang]

This documentation page explains how points get snapped to the network: https://pro.arcgis.com/en/pro-app/latest/help/analysis/networks/locating-analysis-inputs.htm

To summarize, the starting point of the analysis is the closest point on the closest network edge (or junction, depending on settings) that is not restricted.  The Service Area is calculated from that point.  The Service Area cutoff does not consider the distance from the network of the original point.

[JamalNUMAN]

Thank you very much. This precisely explains the result