Yes! This. Some commenters have never heard of driving defensively it seems. Do they really just barrel through uncontrolled intersections if they don't see a s

Yes! This. Some commenters have never heard of driving defensively it seems. Do they really just barrel through uncontrolled intersections if they don't see a stop sign? For that matter, do they really just unthinkingly barrel through greens, always? If so, it probably means you live outside of the city, where you can grow accustomed to trusting that nothing unexpected will happen. In the absence of any signage, there is always an implicit "Yield." -- ie, no requirement to stop, but you should look for conflicting traffic, and preemptively slow down enough so you could stop if there turns out to be conflicting traffic. Heck, in some places even a green light is worth defensively treating as a Yield. In Manhattan, when driving, I barrel through green lights when crossing streets while going up avenues (in center lanes), but treat it more like a Yield, slowing to a quickly-stoppable speed, when going crosstown on streets across an avenue intersection. So what if you have a green light? In practice all three road user types, pedestrians, cyclists, and motorists run reds all the time. You're supposed to drive defensively, and a good driverless car should too. Anyway, I think driverless cars have an implicit advantage here in that their reaction times will be substantially lower. Hopefully they can use statistical evidence to figure out rules like the above ("Treat greens on 3+ lane roads as "No Stopping" sign, but on smaller roads, treat them as yields")