US Air Traffic

The following 3-minute video shows US traffic patterns as they ebb and flow throughout the day. The data is from March of this year and is real, spiking from a low of about 4000 flights to over 16,000 flights in the air at peak travel periods. There are so many that the flight paths actually acurately delineate the shape of the continental United States.

Found on US Air Traffic by Brad DeLong (Grasping Reality with Both Hands).