CM is no construction engineer but this bridge expansion joint on the right (under the south side of the Cahill Expressway 100~150m before it veers left across Circular Quay) is looking rather sickly. While the top has a ball joint and the bottom leading edge looks to have a beveled surface to allow some flex/give to the structure above, it looks as if it has been sitting in that position for quite some time. Simple physics around force distribution at odd angles and metal fatigue data on a 60yr old part might be worth checking.
Averaging 30,000-40,000 cars a day and a dedicated bus lane means it gets a regular pounding. NSW RMS Minister Melinda Pavey has been informed of it.