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Edition:Final Report
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Abstract:The Federal Highway Administration (FHWA) within the U.S. Department of Transportation has been using its cooperative driving automation (CDA) program to lead research, development, and standardization that demonstrate CDA technologies’ benefits and accelerate industry adoption and deployment. The FHWA and the Intelligent Transportation System Joint Program Office, with support from other modal stakeholders, developed a set of opensource CARMA℠tools to support research and demonstrate system-level safety and mobility benefits provided by CDA using transportation systems management and operations strategies and vehicle-to-everything connectivity. This document serves to help develop an understanding of spectrum requirements for the deployment of multiple CDA scenarios that would aid in making future decisions and recommendations regarding available communication technologies. The scenarios combine different use cases and applications developed thus far in the CDA Program. For selected combinations of the use cases, the team performed quantitative analyses of the low-latency spectrum needs by using such parameters as message size, transmit frequency, and communication range. The outcome of this analysis indicates the need outpaced the available spectrum in the 5.9-GHz safety band and recommends considering alternative communication paths for non-low-latency messages.
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