With the EROAD system you do not need to add Off-Highway geofences in order to claim Off-Highway distance. The system will automatically detect when the vehicle is Off-Highway and include it in any Off-Highway claims. 

If you draw an Off-Highway geofence over a public road, you will need to either:

1. Save anyway, as the public road portion of your journeys will be automatically removed from Off-Highway reports or claims
2. Edit the geofence shape to avoid public roads
3. Deselect the type "Off Highway Area"