I’ve only been driving a couple of years so would like the view of more experienced drivers. I was waiting to join a basic 4 entrance/exit roundabout. I was indicating left (leaving at my first exit, a quarter way round the roundabout). The car to my right was also waiitng to join roundabout and also indicating left - IE signalling they would exit at my entrance so we wouldn’t interfere with one another. He/She was indicating for at least 3-4 seconds before joining the roundabout, at which point he/she began driving slowly as if their intention was indeed to leave at their first exit (my exit) while still continuing to indicate their intention to leave for a further 2-3 seconds on entering the roundabout
(ie,still indicating their intention to exit at my entrance).
I’d been observing this car closely (roundabout wasn't very busy) and so given their clear and unequivocal indication that they were NOT going straight ahead but were leaving at their first exit (IE, clear left exit available to them, continuous left indicator, slow driving speed) I decided to pull out. At which point it transpired they WERE going straight ahead after all, they had to brake (not dangerously), and I got beeped.
So I guess to summarise it’s this -
you’re on a roundabout and the car to your right is giving and has been giving clear and unequivocal signs that they’re getting off before you’re getting on - so you get on. But then car to your right changes their mind/doesn’t understand indicators etc - and so decides to go straight over after all, Are you still in the wrong for moving out (obviously not dangerously so, as in leaping out 5 metres in front if they did happen to change their mind) in front of them? And even if you are wrong to move out in theory, wouldn’t it’s application in practice mean that traffic gets seriously delayed - on the off chance that the person to your right is the 1 in 1000 that thinks a clear left signal on an obvious four exit roundabout = I’m going straight ahead.