An adaptive pedestrian billboard system may include a display for passing pedestrian traffic, and a memory for storing a plurality of notifications having different visual feature detail levels. The system may further include a controller configured to cooperate with the display and the memory for determining a density of the passing pedestrian traffic, select notifications from the memory based upon the density of the passing pedestrian traffic so that notifications for higher density passing pedestrian traffic have lower visual feature detail levels and so that notifications for lower density passing pedestrian traffic have higher visual feature detail levels, and display the selected notifications on the display.