Rezoning signs are so small. If you're driving by and paying attention to traffic, you will very likely miss them. If they are set back on a property, or if they are in a strip mall, you will miss them. Making sure that proposed zoning changes in a neighborhood are well publicized, creates transparency. Not every zoning modification alters the nature of a community, but some of them do. By using larger signs, you ensure that everyone has the chance to address any concerns they may have about how their community changes.