Abstract: A vehicle location detector detects the vehicle state such as the location and speed from a GPS signal. Memory stores map data and traffic regulation data in advance. It is determined whether there is the possibility that a driver commits traffic violations based on the vehicle state information and traffic regulation data on the road where the vehicle is traveling. In case it is determined that there is the possibility that the driver commits traffic violations, a traffic violation warning is output via voice and displayed on a display. It is also determined whether the driver has committed traffic violations based on the vehicle state information and traffic regulation data. In case it is determined that the driver has committed traffic violations, the traffic violation details are recorded in traffic violation memory.

Abstract: A vehicle location detector detects the vehicle state such as the locationandspeedfrom aGPS signal. Memorystores map data and traffic regulation data in advance. It is determinedwhetherthereisthepossibilitythatadrivercommits traffic violations based on the vehicle state information and traffic regulation data on the road where the vehicle is traveling. In case it is determined that there is the possibility that the driver commits traffic violations, a traffic violation warning is output via voice and displayed on a display. It is also determined whether the driver has committed traffic violations based on the vehicle state information and traffic regulation data. In case it is determined that the driver has committed traffic violations, the traffic violation details are recorded in traffic violation memory.

Abstract: A body of a car stereo has a first substrate and a detachable grille has a second substrate. The second substrate has an operating device, a display and a control unit where an identification data is stored. The first substrate has a grille attachment detecting device a power supply means and a control unit having an identification data discriminating device which discriminates the identification data in the control unit on the second substrate of the grille. When the identification data discriminating device determines that an appropriate grille is attached, the power is fed to the grille through the power supply device.