Uber Shuts Down Arizona Self-Driving Vehicle Operations

"We've made the tough call to wind down operations in Phoenix," said Mr. Meyhofer in the email reviewed by The Wall Street Journal. "This is the best path forward as we work to get back on the road as soon as possible." A spokesman confirmed the memo and said about 300 test drivers are affected in Arizona, which has grown to become Uber's largest testing ground. The company plans to continue with its autonomous-car programs in San Francisco, Toronto and Pittsburgh. Uber voluntarily suspended testing of its vehicles on public roads in all of these cities immediately after the Arizona crash.