Uber TechnologiesUBER stock slipped Tuesday, as news of Waymo's latest expansion revved back up the debate about autonomous vehicles and the ride-hailing market. The AlphabetGOOGL-backed Waymo said late Monday that it will expand to Dallas next year in partnership with Avis Budget GroupCAR.

Self-driving taxis from Waymo are now operating in Atlanta via Uber. Here’s what to know about safety, service areas and how the robotaxis see the road.