computer modules, display, and a dedicated short-range communications radio, which are installed and embedded into vehicles and provide an interface to vehicular sensors and a wireless communication interface to the roadside and back-office environment (1). The Federal Communications Commission (FCC) has issued a ruling to reallocate the spectrum that is dedicated to transportation safety. While there was a 75-MHz allocation for DSRC, FCC has made the lower 45 MHz of the 5.9-GHz band available for unlicensed operations such as Wi-Fi and allocated the upper 30 MHz for cellular-vehicle-to-everything operations (24). Existing DSRC licenses are able to continue operating in the upper 30 MHz; however, existing operations in the lower 45 MHz are required to cease operations after the one-year transition period.
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