Who is at fault if you are sideswiped while changing lanes to the left by a car that is also changing to the left but was far behind in the original lane when you started and was speeding?

Answer 1

That would be the speeder, not the original passer. You held the right of way as soon as you took the passing lane legally, in other words, you were there first. I know, that's a very simple way of putting it, but it's the truth, so long as you weren't speeding as well.