A bit of everything, really. The old route just narrows down into one lane coming to the Anzac bridge. And there's the fact that there's a westconnex exit there too now. So it's one hell of a bottleneck. There's also the signage. The new tunnel that connects Iron Cove with Anzac is free, but the signage doesn't reflect that. So that caused a few people to stick to the old route which didn't help the situation.