This month, situated among foldable tablet computers and flying taxis, the U.S. Secretary for Transportation, Elaine Chao, unveiled at the Consumer Electronics Show (“CES”) the U.S. Department of Transportation’s (“DOT”) long-anticipated fourth round of automated vehicles guidance, “AV 4.0.”  Formally entitled, “Ensuring American Leadership in Automated Vehicle Technologies,” AV 4.0 is less regulatory guidance and more regulatory aggregator.  The document lists in great detail the various Administration efforts—across 38 federal departments and agencies—geared toward promoting, supporting, and providing accountability for users and communities with respect to autonomous mobility.