Network analysis for a routing service generates inaccurate drive-time areas when non-reachable streets are classified as 'reachable streets'.

Workaround

Workaround 1: Edit and correct the polygon vertices for the erroneous drive-time areas manually in Map Viewer:

1. In Map Viewer, select the drive-time areas output and click Edit.
2. Right-click within the drive-time polygon and edit vertices.

Workaround 2:

1. Relocate the feature's location away from the non-reachable feature that is referenced as reachable.
2. Re-run the drive-time analysis.

Steps to Reproduce