Keystone at the Crossing runs on its own clock on the north side -- office towers, corporate campuses, a shopping district built around the interchange where 465 meets Keystone Avenue -- and none of it stops for weather, so the parking lots and entrances there have to stay ahead of a storm rather than catch up to it. A single lot up there can run to several acres, striped rows disappearing under snow within an hour of a good storm starting, and keeping the entrances and fire lanes clear means running a route on a loop, back to the same lot every couple of hours rather than once and done. Sidewalks connecting the office buildings to the parking get their own separate attention, salted ahead of the morning rush and again before the lunch crowd moves between buildings. The pace up there runs differently than it does closer to downtown -- steady, repeating, timed less to the storm itself than to when the next shift of workers needs a clear path. It keeps moving because the district around it never really stops.