Officers saw Pierce asleep at the wheel and “noticed signs of alcohol impairment” so they conducted a DUI investigation, the press release said.

Former NBA player Paul Pierce was arrested Tuesday night on suspicion of driving under the influence on a Los Angeles highway after he was found asleep behind the wheel, state police said.

CHP officers “noted signs of alcohol impairment,” leading to Pierce’s arrest.

Tesla is being investigated by the US government after reports the firm's self-driving cars had broken traffic laws, including driving on the wrong side of the road and not stopping for red lights.

Auto safety regulators are investigating Tesla Inc. over incidents in which its vehicles drove through red lights and violated other traffic laws while using the company’s partial-automation software.

The agency said it has reports of Tesla vehicles using FSD driving through red traffic lights and driving against the proper direction of travel during a lane change.