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August 26, 2017 02:00 am

Waymo Built a Fake City In California To Test Self-Driving Cars

An anonymous reader quotes a report from Ars Technica: In May, Waymo revealed key details of its latest self-driving car design to Bloomberg as part of the rollout of a new program that ferries ordinary passengers around in Phoenix. Now The Atlantic's Alexis Madrigal has a new piece revealing important details about Waymo's extensive infrastructure for testing self-driving cars. Madrigal reports on two Waymo projects that haven't been previously made public. One is an extensive virtual city in California, 100 miles east of Silicon Valley. Named Castle after the former Castle Air Force Base, the facility hosts a network of private roads for testing self-driving vehicles. It's a proprietary cousin of Mcity, the open vehicle testing facility we visited in 2015. At the Castle facility, Waymo builds replicas of real intersections -- like a two-lane roundabout in Texas -- that have given Waymo cars trouble. Having their own extensive network of private streets allows Waymo engineers to perform repetitive tests to observe how Waymo's software reacts in carefully controlled situations. In one series of tests seen by Madrigal, another car cuts off a Waymo car at a variety of speeds and angles. The tests were designed to help engineers calibrate how hard cars brake in these kinds of situations. Brake too slowly and there's a risk of a crash. Brake too hard and passengers will get whiplash. The Castle team has amassed an extensive collection of props -- traffic cones, tricycles, fake plants, dummies -- that help simulate a wide variety of road situations.

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