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Six state representatives in Hawaii have introduced a bill (HB 2238) that would direct that state's "director of transportation, in consultation with the insurance commissioner and the examiner of drivers of each county," to "adopt rules in accordance with chapter 91 providing for the operation of autonomous motor vehicles on highways within the State." This follows developments in Nevada and Florida.
Nevada's Department of Motor Vehicles has continued its rulemaking process for autonomous vehicles by announcing a public hearing on its draft regulations. [Update: The final regulation is available in the Nevada Register. I have offline copies of the drafts.]
Meanwhile, a member of Florida's House has introduced a bill (HB 1207) that would (1) explicitly permit the operation, under certain circumstances, of "[v]ehicles equipped with autonomous technology ... for the purpose of testing the technology" and (2) direct that state's Department of Highway Safety and Motor Vehicles to "prepare a report relating to the safe operation of vehicles equipped with autonomous technology on public roads," including "recommended legislative action and proposed department rules." A state Senator has introduced a parallel bill (SB 1768) that would require only "a report relating to the safe operation of vehicles equipped with autonomous technology on public roads."