It looks like the road is about 400 ft from the end of two runways.
I believe the cones and road signs were up to control traffic entering the airshow. The only entrance to the airport is about 200 ft along the road from the crash site.
He did a very curious correction a slight aileron roll to the left just before impact.
This is purely speculation but it looks to me as if he may have had a grayout coming through the loop and the correction was a sign he was regaining full consciousness and beginning to react to the situation.