The crossing
The second part is the move from work to home. For most of the history of work it was built in. You walked out of one building and into another, and the walk was the crossing. The car has kept some of that. Working from home has removed it entirely, and chapter 24 comes back to that. But even with a commute, the crossing only works if it's used as one, and a drive spent on the rerun is a drive in which the office comes home a mile at a time.
Choose a marker. Something you do, every day, that means work has ended. It should be physical, short, and the same. Changing your shoes at the door. Walking the last street rather than driving it. A shower. Putting the work bag in the same place and not touching it until morning. A coat goes on the hook and stays there until it's needed, and the marker is where work hangs. I'd pick one and keep it for a month before judging it, because the marker works by being repeated, not by being clever.
Use the drive for the crossing, not the rerun. Radio, music, a podcast about anything else, silence if you like silence. If the rerun starts, and it will, notice it, and ask the one working-out question from chapter 6. What's first tomorrow. It's on the last line, so the answer is quick. Then back to the road. The rerun will start again and you'll do the same again. That's not failure. That's the drive.
Give the evening something to do. Sabine Sonnentag and Charlotte Fritz, in the paper that gave the research its measuring tool, identified four things that help people recover from work. Detachment is one. The other three are relaxation, mastery, which is doing something you get better at, and control, which is choosing how you spend your own time. Detachment on its own is hard, because an empty head fills with the passenger. Detachment plus one of the other three is much easier, because the head's occupied. Chapter 22 is about what to put in the evening. The point here is that the crossing should lead somewhere, and "somewhere" shouldn't be the sofa with nothing in your hands and the spreadsheet waiting behind your eyes.
Say the sentence at the door. If the day was bad, say so on the way in. "I've had a day, I'll be poor company for half an hour, it's nothing to do with anyone here." Chapter 7 said why. It changes what the quiet means, and it gives the half hour an end.
The crossing takes no time you weren't already spending. It's the same drive, the same door, the same first ten minutes at home. What changes is that they're being used to end something rather than to carry it.