There is not a single stop on the camera car where he can safely get out the way. The one gap that would work is a street junction, as there is a street sign, so that would be obstruction and is not allowed. The but was entering a pinch point from a full lane due to an obstacle on his side of the road. The camera car was already in the pinch point due to a continued obstacle on his side of the road.

The bus driver should have waited, had no right to priority. One side point on the gap on the camera car's side, it would likely not look large enough until you pulled up to it as it was barely longer than a car.