A navigation system (10) comprising a portable navigational device (12) and a remote control for remotely controlling the navigational device (12) is provided in a first preferred embodiment. The navigational device (12) is sized and configured to mount on a dashboard or in an overhead console of a vehicle. A second preferred embodiment provides a navigational device (212) substantially similar to the navigational device (12) of the first preferred embodiment and further including an internal hard drive (84) and a heating element (86) associated with the hard drive (84) and operable to warm the hard drive (84) for facilitating operating performance of the hard drive (84) in cold temperatures. A third preferred embodiment provides a navigation system (310) including a navigational device (312) substantially similar to the navigational device (212) of the second preferred embodiment and a remote control (314) substantially similar to the remote control (14) of the first preferred embodiment.

 
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> Broadcasting real-time short range RF real-time information to motor vehicles moving along a highway via a sequence of short range RF broadcasting stations along the highway broadcasting to all vehicle transceivers within said range

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