The pitch had almost zero movement or bounce for the fast bowlers for all 5 days = a road.
England were bowled out for 170 because they were abysmal.
Australia batted on the 5th day and scored 170 without losing a wicket = road.
The groundsmen would have been tasked with producing a pitch that lasts 5 days, so that CA can maximise profit, which they did successfully. But it was a batsman's paradise.
