At four in the morning Brunswick Pike is empty enough to hear the traffic lights click, and that is the hour the plow routes begin. Mercer Group Landscaping LLC clears lots and driveways along the Route 1 corridor and in the neighborhoods a half mile behind it, pushing the piles back and salting so the first cars in never think about it. Warm weather turns the same attention to grass — mowing, string trimming, edging, and cleanups that carry off load after load of leaves. Lawrence Township lives on that highway strip and on quiet streets, and both want to look kept. The job is right when a place looks like nobody had to work at it.