Last month, Alphabet offered up its first proper look at Carcraft. The simulation is a virtual home away from home (the real world) for Waymo's self-driving vehicles. Here, you'll find a replica of every real-world mile the autonomous cars have driven. And, each day, Waymo's 25,000-strong fleet of Chrysler Pacificas traverse 8 million of these simulated miles. That's according to the company's latest blog post, which further breaks down its software. By honing in on a traffic signal in a particularly busy intersection, Waymo demonstrates how Carcraft can teach its connected vehicles to envision an exhaustive amount of scenarios (including hazards). In turn, the cars can then practice the manoeuvres that will help them safely navigate these situations in the real world.