Quite often I have an instinct to flash my headlight because I'm not sure if someone waiting to pull in to the traffic either doesn't see me or doesn't realise that their (car) body language is saying that they are gonna go for it. However I never do flash for a few reasons. 1. I don't want to seem overly aggressive 2. I wonder if they will think it's a friendly signal to indicate that I'm a polite person like them and I'm doing the equivalent of waving them in. Yesterday I had an old biddy who appeared to be waiting for me as there was no other traffic then just as I approached she started to roll forward then we both braked. I was wondering what the current etiquette is regarding this. Could flashing a car waiting at a t section be misinterpreted as waving them through or would you trust that they see it simply as a nervous motorcyclist wanting to be sure they are seen? I have recently discovered that there are things called headlight modulators and they seem like a good way out of this conundrum. Are they easy to fit on a gs500? Any thoughts welcome.