FFS, You don't need beepers on a bike!! who has those?? Just get in the habit of pressing the cancel button a few times after completing a manoeuvre. It should be second nature to you after riding 15years. This is the worrying part... You don't just change lanes regardless, that's how you get knocked off!! If you're in the wrong lane and its not safe to get in the right lane you continue in the wrong lane and sort it out later - that's why they teach you how to do u-turns! I've done it loads of times when lost in the car and on the bike, the rest of the traffic doesn't suddenly stop because you're in the wrong lane and need to change!! You need to consider the impact of your actions on other road users and be mindful that they are in thier own little world oblivious to you and your actions.. Besides accident avoidance, if you find yourself having to make split second judgment calls, its a good indication that you've not planned ahead properly. Sorry, but it really does sound like more training is required. I suspect you have 15years of bad habits that need unlearning.