I don’t have my camera with me, and I wanted to capture this desire line I spotted in downtown Toronto. Apologies for the shaky-cam technology:
A desire line is the abstract line that represents the shortest route between an origin and destination, and shows where people want to travel. The width of the line represents the amount of demand. Desire lines were used in early transportation planning, prior to the advent of computerized models.
They are manifested on the surface of the earth in certain cases, e.g. as dirt pathways created by people walking through a field, when the original movement by individuals helps clear a path, thereby encouraging more travel.