MOTOR VEHICLE NAVIGATION SYSTEM

摘要

The invention concerns a method and a system (10) for motor vehicle navigation. More particularly, said system comprises a central navigating computer unit (11) equipped with a memory (12) containing the topography of a predetermined zone and a device for locating (13) the vehicle. The central computer unit (12) is associated with a vocal guiding device (15) and a display screen (14) operating in a so-called "normal guidance" wherein at least one direction pictogram is displayed on the screen to indicate the relevant manoeuvres which have to be presently reproduced by the driver. The system is characterised in that it comprises: a control unit (16) adapted to operate the vocal guiding device (15) and/or the screen (14) in a temporarily enhanced mode, wherein a voice message and/or a direction pictogram reproduces the stored topography of the area for which enhanced guidance has been requested, said enhanced guiding pictogram and/or voice message being obtained by a temporary modification of the filtering applied to the stored topographical data. The invention is designed to be implanted in onboard navigation aid system in motor vehicles.