Why is there more snow on my sidewalk and in my driveway than my neighbors?

Most residential streets receive a center pass (traffic permitting) and then 2 gutter passes. Each pass pushes the snow to one side or the other. That means one side is getting 2/3's of the snow in the street with each set of passes from the plow. How much snow one side of the street receives will vary with the route taken by the plow driver(s) during a given storm. Only the snow that is in the street is cast to the side.