Originally Posted by remdog
A signal only entitles you to change lanes if it is safe. If you are driving professionally then I would expect you to know where you are going and to do so in a safe manner. In California trucks can only travel in the right two lanes (with minor exceptions) on the freeway so it's not too tough to figure out where you should be if you are going to 'need' a lane. I expect you to plan ahead and then you won't 'need' that lane, you'll be in it.
I do plan ahead, but sometimes when you figure out that you need to make a change, and you're trying to do the responsible thing and get into that lane early, and people keep speeding up to keep you from coming over because they don't want to be behind something taller, it gets kind of ridiculous. When I see a signal, I back off and give that person room to come over. I expect the same from others.
As to lane restrictions...don't get me started. Those and split speed limits should be abolished.