Mcity is a cool lab to test self-driving cars in a neighborhood all their own. It’s a 32-acre simulated town with streets, intersections, traffic signs, buildings, and sidewalks, opened yesterday at the University of Michigan. Mcity also has robotic human dummies, designed to anticipate all possible road obstructions and accidents. With many in the industry expecting completely autonomous cars to hit the road within the decade, Mcity will play a key role in studying how these cars will be able to sense and react in time to potential pedestrian accidents.