 And once you see those signs, stay where you are. If you're in the lane that's closing, you want to resist that urge to move over into the lane that's continuing and stay in your lane. As you approach that merge point, then look for those spaces and look over your shoulder, signal your merge, and then just start to safely move over into the gaps in that lane. And in a perfect world, that's kind of how that zipper merge works.