I find it very frustrating at roundabouts. Peopel are just making it up as they go allong. The big roundabout on the way from the Spawell to Wellington in Templeogue (Dublin ) is a prime example. Coming down towards it from Spawell there are 2 lane enterign the roundabout. Very simple you would think, left lane for left and straight and right lane for Right and coming back on yourself. There only 1 lane at each of the exits. Yet at least half of the people in front an dbehind me every time use the right lane to go straight, some indicate right while being in the right lane to go straight.
I even had one guy in a golf look in his rearview mirror and shake his head at me after he went straight in the right lane and I went straight from the left.
I was 2 cars behind a woman the other day that took up position in the right lane indicating right, but whe wasnt fully in the right lane, her left wheels were in the left lane. Needless to say as she got half way roudn she indicated left and exited , meanign she went straight throught the roudabout. Now I did'nt think much because this crap happoens all the time. But at the next roudnabout down at Perrystown , which has the same lane layout but is a small roundabout she goes straight through but from the left lane and does no indicating. Did she suddenly realise how to use lanes properly and ferget she had indicators? All in the space of a few hundred meters.