The Scotland international was in an accident involving a Range Rover on the M1 heading southbound at 5.30am on Sunday, and was arrested by local police before later being bailed.
The 21-year-old was accompanied by Shrewsbury striker James Collins, a former Villa player, who also was arrested and bailed.
Villa boss Alex McLeish confirmed that the inquiry over the incident has began.
“There are internal inquiries and an investigation going on and that’s all I can really say at the moment. We felt it was best that he did not train with the team today [Monday],” the Scottish manager told The Guardian.
The energetic midfield man is regarded as one of Villa’s most exciting prospects, and has been a welcome inclusion in Craig Levein’s Scotland squad of late.
The former Celtic youth player has won nine caps for his country to date, and has added guile and creativity to a at times static Villa midfield.
By Gareth McKnight