Long-distance drivers prepare for their cross- country runs. Supplies always have to be delivered: frozen pizza, wild-caught salmon (also frozen), potatoes from midwestern farms. Garlic and onions, dental implants, pet food, lemons, lumber, and nails. Boxes of Plan B, testing strips, emetics, copper wiring. Plush toys, Ibuprofen, cement, ears of corn. It's not all quiet. There's a constant hum, but like light pollution, it can be hard to discern. I remember that highways have tributaries just like rivers— on some, you might be able to go off-grid for a while. On some, there are no houses or rest stops for miles and miles and miles.