The Federal Communications Commission announced today the adoption of new rules governing cellular-vehicle-to-everything (C-V2X) technology, a move designed to enhance transportation safety and improve the efficiency of mobility systems. The decision represents a significant step toward modernizing communications between vehicles, infrastructure, and other road users, including pedestrians and cyclists.
The newly finalized rules focus on optimizing the 5.9 GHz spectrum band, which is dedicated to Intelligent Transportation Systems (ITS). C-V2X technology enables direct communication between vehicles and their surroundings, providing critical data on changing road conditions, enhancing non-line-of-sight awareness, and supporting the development of automated driving technologies.
“This is a victory for innovation and public safety,” FCC Chairwoman Jessica Rosenworcel said in a statement. “By modernizing the 5.9 GHz band, we are fostering advances in both wireless and transportation technologies while making our roads safer for drivers, pedestrians, and cyclists alike.”
The order, unanimously approved by the bipartisan commission, paves the way for a smoother transition from older Dedicated Short-Range Communications (DSRC) systems to the more advanced C-V2X framework. The auto industry and government agencies will now be able to implement updated in-vehicle and roadside units operating on C-V2X technology. These units will benefit from the flexibility to utilize 30 megahertz of spectrum either as three separate 10-megahertz channels, a combined 20-megahertz channel, or a single 30-megahertz channel.
The FCC’s decision comes after nearly a decade of efforts to reevaluate the 5.9 GHz band’s utility, with Chairwoman Rosenworcel spearheading bipartisan discussions about its optimal use. In addition to promoting safety, the updated rules include provisions for technical standards such as power limits and message prioritization, ensuring efficient spectrum usage.
Devices previously approved under C-V2X waivers will remain operational under the new rules, and a timeline has been established for phasing out older DSRC-based technology.
The Commission’s decision is expected to accelerate the deployment of C-V2X systems nationwide, offering substantial safety benefits to the public and setting the stage for the next generation of connected transportation technologies.