It’s a potentially significant development in a years-long debate that saw automakers fight to retain frequencies they’ve barely used. Carmakers say they’re poised to finally use the airwaves to connect vehicles and infrastructure to prevent collisions.

The FCC sent the proposal to the Transportation Department in recent days, said two people who asked not to be identified discussing the private deliberations. If DOT agrees, FCC Chairman Ajit Pai could set a Dec. 12 vote on the proposal to modify the grant of airwaves it made 20 years ago.

The Transportation Department has long resisted the idea and remains concerned and will likely oppose the FCC’s latest plan, one of the people said.

Representatives for both agencies declined to comment.

Cable providers who offer Wi-Fi for customers’ wireless use are hungry for spectrum as digital technology transforms everything from cars to video feeds and household appliances.
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