Automakers, toll- road authorities and public safety officials are starting to lay the groundwork for deployment of technology that could make every car and truck manufactured in North America the hub of a built-in, high-speed wireless LAN system. The in-vehicle wireless technology is based on a licensed Digital Short Range Communication (DSRC) system designed to support automatic toll payment and safety applications, which could even enable emergency vehicles to change traffic lights. And since DSRC operates in the 5-GHz band, which is also used by un- licensed 802.11a wireless LANs (WLAN), DSRC backers envision wide-scale production of dual-band chips.
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