"The white dots are the circulating vehicles at that moment. The trails of the vehicles group themselves into main arteries where the thickness represents traffic intensity. Each trail constitutes a temporary route where the average speed is mapped to its color. Pure green represents average speeds of 60 km/h. Therefore cooler and greenish hues traduce rapid transit arteries, while the sluggish ones are reddish and hotter. There is a visual emphasis on the slower areas, with hot colors traducing sluggish traffic." - David Vasileff