Imagine if your car could send messages about its speed and movements to other cars on the road around it. That’s the dream of the National Highway Traffic Safety Administration (NHTSA), which thinks of Vehicle-to-Vehicle (V2V) communication technology as the leading solution for reducing accident rates in the United States. But there’s a huge problem: it’s extremely difficult to have cars “talk” to each other in a way that protects the privacy and security of the people inside them, and NHTSA’s proposal doesn’t come close to successfully addressing those issues. EFF filed public comments with both NHTSA and the FTC explaining why it needs to go back to the drawing board—and spend some serious time there—before moving forward with any V2V proposal.