As a bike commuter on dual-use paths I use it to mean "I am overtaking on the left, do not veer into my path". Moving to the right if easy would be courteous bu

As a bike commuter on dual-use paths I use it to mean "I am overtaking on the left, do not veer into my path". Moving to the right if easy would be courteous but not necessary. I use it in this way when passing both pedestrians and other bikes. I have a bell I sometimes use for other bike commuters but almost always use the call out for pedestrians. I have enough room by quite a large safety margin, I'll pass bikes with no warning. ETA: If you are running or biking 2 or 3 abreast, I may actually mean "move right", but that is a fairly rare occurrence...