US Patent 7925429 Personal GPS navigation device

A navigation device is disclosed. In at least one embodiment, the navigation device includes a storage device to store map information;a processor to determine a route of travel based upon a current position of the navigation device and an input or selected destination position; anda display to display the current position on the map information corresponding to the determined route of travel, the display including relatively more detail of the map information being displayed upon the processor determining that a speed of a vehicle, in which the navigation device is located, is below a threshold speed.