[dpark]

> because hackers could very easily have cars crashing into each other at full speed.

Not just hackers. If we assume that cars would be weaving through the intersection at full speed, human drivers are going to do dumb stuff and cause high speed collisions. “Just fly through the intersection at 70 miles an hour… Follow the car in front of me… Make my left turn… CRASH.”

For that matter a dog running into the intersection is likely to cause a high speed collision. Implicit in the assumption that the time savings comes from this “fast flickering” and allowing cars to speed through the intersection in small windows is the fact that the safety margins are very small.