Originally Posted by KraneXL

I suggest you learn to adapt. Air horns are large and bulky and don't adapt to cycling very well. They may get the motorist attention, but that's mostly out of curiosity more than anything else.

Its really up to the cyclist to be aware and anticipate danger and make preparations to avoid or go around it; motorist seldom yield the right of way. That's just a matter of size, and the perceived road hierarchy.