The citation for affray is normal and the police will throw them in as standard just to cover their arse, but as his actions there when he was out of his vehicle cannot be described as unlawful as they were reasonable he won't get convicted.

Careless driving on the other hand, he is buggered there(if they follow the case). Attempting to drive onwards when your path is not clear is careless driving, he is lucky they didn't throw in dangerous driving and reckless endangerment too.
So the question is if this does get followed up does the State have mandatory sentencing on driving charges or are they discresionary?