NAVIGATION METHOD AND SYSTEM OF A VEHICLE

When an approaching crossroad is detected on a target route, the method and apparatus of the invention determine if the relevant turn signal is operated before the crossroad, as well as informing the driver of the crossroad. According to the invention, if the relevant turn signal is not operated, routes different from the target route are calculated before the vehicle arrives at the crossroad, and if the vehicle does not follow the target route at the crossroad, the target route is changed according to the vehicle position.