A vehicle-mounted apparatus includes a radio frequency identification
(RFID) reading unit for reading an RFID signal from an RFID tag attached
to an article placed in a vehicle, a system controller for determining
the nature of the article in the vehicle on the basis of the read RFID
signal, and an user interface unit for outputting the nature. The system
controller determines whether the article placed in the vehicle is
dangerous or not. If the article is determined to be dangerous, the
system controller outputs information for warning a user via the user
interface unit.