The recall comes as the top automotive safety regulator in the U.S. has warned AV companies about their vehicles interfering with first responders.

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The Department of Transportation wants to remove the brake-pedal requirement for vehicles "designed to be driven exclusively by automated driving systems."

The new Zoox robotaxi has more cushioning, lighter colors, and a better microphone and speaker for communicating with Zoox Support.

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Aurora, May Mobility, Motional, Nuro, Tesla, Waymo, and Zoox all refused to cough up a number during Senator Ed Markey's recent investigation.

It's a precursor to launching robotaxis in those cities, though the Amazon-owned company is still waiting for federal approval to commercially operate its purpose-built AV.