A method and apparatus for improving a network is described. The network uses the energy from a vehicle battery or vehicle generator to power an intermediate transmitter device that receives the signal from a portable wireless device and retransmits the information in the signal to a base station. The intermediate transmitter device also receives information from the base station and retransmits the information to the portable wireless device. The described system expands the areas in which a wireless device may be used.

 
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< Traffic information providing system and car navigation system

> Apparatus and methods for interactively displaying information relating to a vehicle

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