Where Route 46, Route 23 and I-80 braid together near Willowbrook, the parking lots are wide, flat and unforgiving once the snow starts. DHK Contractors LLC runs them at midnight, when the lanes are empty and a plow can take long, clean passes instead of picking around cars. Aisles get cut first, then the edges, then the walkways and entries by hand, with salt down before the surface glazes over. This commercial ground drains toward the Passaic lowlands, so a windrow left in the wrong place becomes a slick spot by dawn. The measure of the night is simple: the doors open on time and nobody notices the storm.