The extensive simulation – reminiscent of the virtual cities created for human captives in sci-fi blockbuster The Matrix – exists entirely inside computers at the company’s Mountain View location, and the cars have so far virtually “driven” more than 4 million miles inside it, facing challenges just like those in the real world, such as lane-weaving motorists, wobbly cyclists and unpredictable pedestrians.

Google lobbies to test self-driving cars in Matrix-style virtual world | Technology | The Guardian

Dear Google.
Seriously ‘matrix-style’? The Circle is getting more and more true.