Qld cop facing extra assault charges.

Controversial Queensland cop Senior Sergeant Chris Hurley has been charged with three additional assault charges at the start of a two-day trial on the Gold Coast.

Hurley is facing trial in Southport Magistrates Court over a 2013 incident in which he allegedly grabbed a motorist by the throat.

He had been charged with one count of common assault over the incident but three further counts were added at the start of the trial.

He has pleaded not guilty to all charges.

Hurley was acquitted of the manslaughter of Palm Island man Cameron Doomadgee in 2007.

The trial is expected to conclude on Thursday.