Geofencing 101: turning map boundaries into automatic alerts

A geofence is a virtual boundary on a map that triggers an action when a vehicle crosses it. At the simplest level, that action is an alert. But modern geofencing platforms — including Argus — support a much richer set of capabilities that make geofences useful for everything from compliance reporting to billing to hazard zone management.

The basics: entry, exit, and alerts

The most common geofence use case is perimeter monitoring: you draw a boundary around your depot, a customer site, or a restricted area, and receive an alert when a vehicle enters or leaves. This is useful for:

• Confirming site arrivals without phone calls
• Monitoring curfew compliance for vehicles that should stay at the depot overnight
• Flagging vehicles that leave an approved operating area

Argus supports circular, polygon, and address-based boundary shapes, so you can match the boundary to the actual shape of the location.

Time-limited fences

One of the more powerful features is time-based scheduling. A depot curfew fence might only be active between 7 pm and 6 am on weekdays — outside those hours, vehicles coming and going don't generate alerts. A customer site fence might only be active during business hours when deliveries should be occurring.

This eliminates the alert fatigue that comes from geofences that are always on.

Speed limits in hazard zones

Argus geofences support speed-limit configuration, which means you can define a lower speed threshold for specific high-risk areas — a quarry entrance, a school zone on a regular route, or an industrial yard. When a vehicle exceeds the configured speed inside that boundary, it triggers an alert just like an overspeed event.

Geofencing for billing and project allocation

For construction and field service fleets, geofences can serve as time-tracking tools. By drawing a boundary around each job site, you can use the entry/exit log to calculate time spent at each location — supporting project cost allocation, billing, and payroll without manual timesheets.

Bulk upload for large deployments

If you have dozens or hundreds of customer sites, supplier depots, or franchise locations, creating geofences one at a time isn't practical. Argus supports CSV bulk upload, so you can create large geofence sets from a spreadsheet export in minutes.

Geofences work best when they're set up deliberately, with a clear purpose for each boundary and a process for acting on the alerts they generate.