Originally Posted by
doorunrun
I think hand signals are great but there is not a generally accepted signal for "I'm going straight MF, so don't try and cut me off."
And when making hand signals turning your head to the intended direction helps to indicate your intention.
I generally point forward, extending the arm in a bit of an arc to make the point. I do this whenever I enter a rotary and am not taking the first exit, which cars for some reason seem to assume I will do. Works for me so far.