I completely take your point, BM, but, as we are talking about the "right word", I don't think that assertive is necessarily the one I'd choose because moving around within your lane without signalling can require the cyclist to be very assertive.Perhaps riding in heavy London traffic means I have to be a little more assertive? Giving that hand signal often persuades the driver behind to slow up a little and allow me out into primary, as I'm often having to move out with a constant stream of traffic overtaking me.
I'll accept plenty of other alternatives, though. I'm thinking "obvious" or "visual" or "blatant" or similar, for instance.
