Abstract: A navigation apparatus utilized in an electric vehicle includes a position obtaining section subsequently obtaining present position of the electric vehicle, a display controller displaying an electronic map on a display device, an available travel range calculation section, an estimation available travel range calculation section, and a progress calculation section calculating progress of the available travel range relative to the estimation available travel range. The available travel range is available travel distance or available travel time that can be traveled with remaining power of the travelling battery. The display controller displays light beam locus having sector-like shape on the electronic map with the present position as a base in a travelling direction, and changes a length of the light beam locus in the travelling direction corresponding to progress of the available travel range under a condition that the light beam locus is entirely displayed on the display device.

Abstract: A driving state determining system in a vehicle recognizes an obstruction that may collide with the vehicle based on obtained various information. The system executes a plurality of danger determinations that have individual determination conditions, based on a relative distance and a relative speed with the obstruction to thereby comprehensively determine one of danger regions that the vehicle is situated in. The danger regions are classified depending on a danger degree. The system then outputs a determined result to relevant devices. Each of the relevant devices thereby determines operation by obtaining the comprehensively determined result outputted by the system. Consequently, the relevant devices can function more cooperatively and more effectively to lead to increase in safety than another system where each of relevant devices determines operation by individually collecting information.

Abstract: A driving state determining system in a vehicle recognizes an obstruction that may collide with the vehicle based on obtained various information. The system executes a plurality of danger determinations that have individual determination conditions, based on a relative distance and a relative speed with the obstruction to thereby comprehensively determine one of danger regions that the vehicle is situated in. The danger regions are classified depending on a danger degree. The system then outputs a determined result to relevant devices. Each of the relevant devices thereby determines operation by obtaining the comprehensively determined result outputted by the system. Consequently, the relevant devices can function more cooperatively and more effectively to lead to increase in safety than another system where each of relevant devices determines operation by individually collecting information.