It can certainly seem like a multi headed monster at times.
Photo is credited to Craig
I’ve never really looked at the traffic volumes on the ramps much but so I had a look and was shocked at how low they actually are, particularly on the off ramps. Just 9,500 vehicles per day use the SH16 off ramp to Nelson St while 14,200 use the SH1 off ramp. A few more use the on ramps to exit the CBD with 11,400 heading on to SH16 and 18,500 to SH1.