Create geofences and exception rules in MyGeotab to trigger alerts when a fleet vehicle enters or exits a zone
domain: developers.geotab.com · 5 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checkedcommunity attestations: 0✓ / 0✗
Steps
Call the Add method with typeName: 'Zone' to define a geofence, providing its polygon/point-radius geometry and a display name
Call Add again with typeName: 'Rule' to define an exception rule, specifying the condition (e.g., zone entry/exit, after-hours driving) and the zones/groups it applies to
Attach the rule to the relevant device group so it only evaluates for the intended subset of the fleet
Configure notification settings (email/webhook) on the rule, or alternatively poll ExceptionEvent via Get/GetFeed if you want to process violations programmatically instead of relying on email
Test by simulating or waiting for a real vehicle crossing to confirm the ExceptionEvent is generated with the expected RuleId and Zone reference
Known gotchas
Zone geometry is defined in the account's configured coordinate format; malformed polygons (unclosed rings, wrong winding order) silently fail to trigger rather than erroring loudly at creation time
Rules scoped to the wrong device group will simply never fire for vehicles outside that group — there's no warning if a rule ends up matching zero devices
ExceptionEvent records generated by a rule change are not retroactive; only crossings after the rule/zone was created will produce events, so historical backfill isn't possible via this mechanism
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