Four in the morning under Monument Mountain, and the plow lights are the only thing moving on the road. Brush Hill Tree Service runs snow removal in Great Barrington — driveways, turnarounds, and the shoveled path from the door to the car — during the hours after a storm has finished and before the town has started. Berkshire snow comes heavy and wet as often as it comes light and dry, and both kinds have to be pushed somewhere sensible before they set up hard. Salt and sand go down where the grade wants to send a tire sideways. By the time the ridge goes pink, the pavement is dark and wet and the day can begin.