This standard operating procedure in California, they always speed up !!!Yes, but you have to go faster than the car you are passing. In northern Ontario, believe it or not, a large portion of the Trans-Canada Highway is only one lane in each direction, with an occasional extra lane for passing. Some people dawdle along below the limit until you reach an opportunity to safely pass them (sometimes a long straight with no one coming, but more often a passing lane), then they speed up to avoid being passed, when you are finally able to pass them.
They always camp in the left lane
You always end up passing on the right
They are always are on the cell phone oblivious to everything
I recommend as much displacement as your wallet can afford to combat these issues