The image is a photograph of a sign for the Dartford Underground Network. The sign is rectangular in shape and is attached to a pole. The background of the sign is a light beige color with a red and white abstract design on the top left corner. The design features a white arrow pointing to the right with the word "Dartford" written in orange. Below the arrow, there is a text that reads "On" in a bold, sans-serif font. The word "overground network" is written in a smaller, cursive font below the arrow. The sky is blue and there are trees in the background.