 You'll notice that the far right lane is blocked with a crash scene, so stay to the left. But almost immediately once you are past that first crash, you need to move to the right because they are dealing with another broken down vehicle down near 197, so watch out for that. I'll say it again, as you head southbound on the BW Parkway after 198, first you have a single left lane getting by, then almost immediately you're forced to go into the right lane to get on by.