March 9 : Amazon's robotaxi unit Zoox is expanding testing to Dallas and Phoenix and launching a command hub for fleet operations in Arizona, as it looks to widen its footprint in the U.S.'s increasingly competitive autonomous taxi market. The move will expand testing operations to 10 markets across the country, Zoox said on Monday, adding the two Sun Belt cities to existing sites including Las Vegas, the San Francisco Bay Area, Seattle, Austin, Miami, Los Angeles, Atlanta and Washington, D.C.