The driver's manual says that you don't need to signal your turns
unless your actions might affect other people, but making it a habit
to signal whenever you have no reason to refrain from signaling saves
CPU cycles that can be better spent elsewhere. If you notice that
there is someone who might be affected by your actions, you can move
straight to deciding how his actions are going to affect yours -- you
don't have to initiate the signaling subroutine because it's already
Besides, if there's someone around and you haven't noticed, it's
better if at least one of you has a clue.
joy beeson at comcast dot net
The above message is a Usenet post.
I don't recall having given anyone permission to use it on a Web site.