I strongly suspect that a majority of riders fail to use their horn as often as they should. I think some of the reason are: * there's a cultural perception of horn honking as an act of aggression * almost all road users use their horns only to say "ASSHOLE" rather than to give information or prevent accidents (see previous) * it's not surpassingly cool, probably seems highly optional to new riders already stretching themselves to master the vehicle controls Still, it's easy enough to master and can save your ass. I made conscious efforts early on to familiarise myself with it, and I have no doubt it's saved me from numerous situations developing further. It's not uncommon for me to use it several times on a short trip, without raising my blood pressure or tripping other people's angry switch. Here's some of what the UK "police riders guide to better motorcycling" has to say on the topic (emphasis mine): Some examples of when you should use your horn include: * You are negotiating a roundabout, and car appears as if it may be about to violate your right of way * You are approaching a side street, and think a car might pull out and t-bone you * You are merging with another lane of traffic and are not certain the merging traffic is aware of your presence * A car in an adjacent lane indicates to merge into yours and may not have seen you * Pedestrians ahead are looking to see whether they can cross into your path * You're about to perform a manoeuvre which requires another road user's attention The horn is kind of like a very limited musical instrument: there is a range of expressions you can convey other than "F**K YOU!". One or two staccato bibbips can sound positively cheerful, and serve to help other road users know you're there; if that seems a bit much, cover the button with your thumb just in case. Most MC + car accidents are SMIDSY's (sorry mate, i didn't see you) where the car violates the motorcyclist's right of way. Your horn can prevent a lot of them from developing - though you should always be prepared for it to be ignored.