The volume_device can be configured to rect to only vehicles. This this feature is currently very inconvenient as it would require the device to be configured also trigger on agents in order to be able to obtain the correct fort_vehicle through the driver or passenger. This defeats the purpose of that functionality and adds an additional delay, because the agent will never be at the corner of the vehicles collision.
Therefore I would like to request VehicleEntersEvent and VehicleExistsEvent methods which provide a fort_vehicle instance.
Additionally the volume_device should provide query method to check whether a certain agent or fort_vehicle is currently within that particular volume or not.