There are different information about how the apps react / have to behave when the truck is driving. The Developer Guidelines state (Section 7) that:
All applications not explicitly included in the Fleetboard whitelist of safe driving applications will be terminated by us at a vehicle speed >2km/h.
while the Developer Documentation tells that a lock screen is shown.
What's true? Will the app be terminated (including all foreground and background services?) or is just the UI blocked?
the documentation seems to be outdated. The app is simply put into the background. The app is not terminated, thus services are still active.