ELDs automatically switch to driving mode once the vehicle is going at least 5 mph. The vehicle will register as stopped once the speed stays at zero mph for three seconds.
If the truck hasn’t been moving for five consecutive minutes when the driving duty status is on, the ELD prompts the driver to confirm driving status or enter the right one. If the driver doesn’t respond within a minute, the ELD switches duty status to on-duty not driving.
It’s important for drivers to log out of the ELD at the end of the day. If a driver forgets to do so and he moves his vehicle, the ELD will automatically log the vehicle's movement as on duty and driving, messing up his time cards.