Shoe Tree

I have no idea why so many people have stopped their cars here on the A70 and chucked their shoes into this tree.

This is what Wikipedia has to say on the subject...

A Shoe Tree is a tree (or, occasionally, a powerline pole or other wooden object) that has been festooned with old shoes. Shoe trees are generally located alongside a major local thoroughfare, and may have a theme (such as high-heeled shoes). There are currently at least seventy-six such shoe trees in the United States, and an undetermined number elsewhere. Shoe Trees are closely related to shoe flinging or shoe tossing, in which tied-together pairs of shoes are thrown over telephone or electric wires.