Social snow-path-making experiments
My laboratory: is the world!
There is this reservoir near me which people walk around - even in the winter. After some time has passed since a large snowstorm, worn paths tend to form.
The question:
How far out of their way will people walk in order to stay on the "path"
Hypotheses:
No equations yet but it could depend on how steep an angle out of their way the path is heading or how sharply the path turns. It could also depend on the ratio of snow deepness off the path and on the path but this was not investigated.
Experiment:
One morning I managed to be the first person to walk the path after a
large snowfall. I walked/marched in several differently winding paths
with my snowshoes until they were pretty worn (see photo).
I made sure that they had "out of the way" angles slowly increasing,
with increasing curvatures as well (sharp and smooth turns).
Results:
It turns out that the most important measure is the horizontal distance out of the way people will walk. Note that this bend follows my path exactly but they quickly break from it.
A kind of similar pattern happened in the other area below (note the perspective makes these images hard to compare).
The photo at left is after I walked, but before anyone else walked. The photo at right was taken a few days later. Look carefully for the zag.
Discussion:
It turns out that people care more about horizontal distance than anything else in this matter. Also surprising - only the well traveled areas had this effect - in the lightly walked parts of the path, my "experiment" had no effect at all. My guess is that the highly traveled parts were mostly people who needed to get through the snow, but the less traveled parts were walked by people who expected to walk through snow and were therefore more prepared to forge their own path.
Left) before. Right) after. Look for the imprint from my initial path.
If you would like to leave some public comments, please see the post on my blog.