General Motors Co.'s Cruise autonomous driving unit is preparing to resume robotaxi testing with safety drivers in Houston and Dallas metro areas in the coming weeks, following the nationwide grounding after one of its robotaxis ran over a pedestrian in San Francisco in October, according to Bloomberg News. People familiar with the conversations say Cruise executives and officials in several metro areas, including the two Texas cities, are discussing the return of the robotaxi with safety drivers on public roads. Before the accident last…