Saturday mid-morning, and a Stoughton neighborhood of low ranches and deep back yards fills with the sound of one mower after another working up the street. Medeiros Landscaping goes house by house in the same order every week — cut, trim along the foundation and the fence, edge the walk, clear the clippings off the drive. When winter arrives the order runs again with a plow instead: driveways opened, walks and steps cleared, salt on the ice at the bottom of the apron. Cleanups in spring and autumn bracket the mowing season at either end. Knowing a street this well means nothing gets skipped, in June or in January.