DRIVING SUPPORT SYSTEM

The navigation apparatus in a vehicle receives physical condition data regarding user's condition from a measurement instrument through a power line when the vehicle is connected to the power line. The navigation apparatus determines whether a travel condition of the vehicle that is driven by using the sensors disposed in the vehicle, in terms of the driving operation concerning the fuel consumption rate of the vehicle. If the driving operation is not determined as fuel-consumption-conscious, an advice for the driving operation is output from the navigation apparatus according to the physical condition of the user. The user thus can have an appropriate advice for the driving operation that improves the fuel consumption rate of the vehicle at an appropriate timing that takes into consideration of the physical condition of the user under measurement outside of the vehicle.