Tesla's push to roll out its Cybercab robotaxi service will challenge existing regulatory boundaries as the electric vehicle company starts offering paid rides in its sleek two-seat vehicles, which operate without steering wheels, pedals or mirrors.

Just ⁠hours after a recent event in downtown Austin, Texas, to mark the rollout, ⁠the National Highway Traffic Safety Administration (NHTSA) said it opened an audit of about 1,000 Cybercab vehicles to assess how Tesla determined the cars comply with federal vehicle-safety regulations.

U.S. regulators limit commercial deployment of vehicles that do not adhere to decades-old federal safety standards that were written for human-driven ​vehicles and require manual controls.

However, industry experts said regulatory gray areas and Elon Musk's litigious track record could ​give ⁠Tesla a chance to force the Cybercab into broad use anyway.

Amid a frenzy of fans and social media influencers in downtown Austin, Texas, Cybercabs were added to Tesla's robotaxi fleet that now operates its best-selling Model Y SUVs. Tesla said Cybercab rides were open to everyone and executives described pricing plans.