As a frequent user of the Southern Expressway I have seen some of the most amazing/baffling/dumb driving you can think of.
For instance yesterday when coming down the hill, where 100 changes to 80, we had most cars switching to the right lane (Marion Road exit) to get around 2 buses doing 40 km/h in the middle lane overtaking 2 Kalari quarry trucks doing 20 km/h. (Separate argument here, dont get me started on Trucks/large vehicles being allowed on the road during peak hour)
Then all cars were swinging into the lanes to go on to South road. This kept going right up to the Marion Road exit until the cars had no way of getting through, so the rock ape driver(s) decided to stop (in the Marion Road exit) with the left indicator on trying to get back in the South Road lane instead of cutting their losses and getting out at Marion Road. This held up all the Marion Road lanes and Adelaide drivers being Adelaide drivers no-one let this drongo in making it worse. I actually LOL in my car, much to the amusement of Mrs P plate sitting next to me (MatteeG you still got it

What is it about this stretch of road which makes people turn into mindless morons? Or is there just a high % of no-brainers down south?
Post some of your favourite expressway tales...