Good point about signaling. But it ought to be obvious to the tailgater whether moving over to the right would be a safe thing for his prey to attempt.
But in my opinion, it is ALWAYS safe to move into the right lane. I can’t think of a time where I’ve ever felt that a person in the left lane was trapped in the lane, with it being impossible to move over to the right lane.
IT’s not like we think you should instantaneously be out of the way. We just think that within a half-mile or so, you should be able to get your car from one lane to another on a highway.
So I don’t see how it would ever be “obvious” to me that you couldn’t move over, since I believe you can ALWAYS move over. You just have to signal, match speeds, and go. Maybe you have to slow down for a car or two in the right lane who decide they want to cut you off, or wait a minute to get past a few cars before one of them acknowledges your signal and slows down a bit.
Put me in the left lane, with one mile to get off the highway, and I’ll find a way across 4 lanes of traffic. I don’t think it takes much skill either. So I guess I just don’t understand the premise that you could be “stuck” in the left lane with no possibility of getting over.