https://www.cnet.com/roadshow/news/ces-2019-ford-c-v2x/

Under development for decades, DSRC creates a short-range, point-to-point network that enables cars to talk to nearby objects. However, now that 4G is widespread, and with 5G coming soon, many in the industry believed it was time to ditch DSRC and go with cellular. That's exactly what Ford is doing here.

In announcing the service, Executive Director of Ford's Connected Vehicle Platform Don Butler said that this C-V2X system is meant to "complement" the onboard sensors that enable the company's autonomous cars to function. "While these vehicles will be fully capable of operating without C-V2X," Butler said, "the technology could help them create more comprehensive maps of the world that lies beyond the view of lidar, radar and cameras."