If driverless cars can communicate with one another at all times, brake pedals have diminshed utility. From IEEE Spectrum: “It’s not just the sensor-driven skills that will soon be common to individual cars that will shape the future of automotive transportation, but also the ability for cars to communicate with each other, sharing constant updates about exactly where they are and where they’re going. And with enough detailed information being shared at a fast enough pace between all vehicles on the road, things like traffic lights become completely redundant.”