We are still learning. I approach haiku as an exercise in expanding consciousness, an attempt to see the world in a new way because of this haiku is often a work in metaphor. (what is often referred to as pivot would be the word like or as in English) When too much focus is placed on form then the 'aha' moment can be lost to criticism or restriction, affectation. Then why bother says I. The best 'rule' I have ever encounter is that haiku is contained within a breath. This gives flexibility to the creator but ensures brevity.

I am wondering though. If you wanted a more pictorial haiku why specify such a long syllable count? (perhaps it was only a suggestion, I cannot remember). If I may offer a more brief and symbolic version ...

a forest
hidden highway ...
soft footsteps

Of course, now, I have really given form the boot:)