What on earth is a path?
You can receive bonuspoints for "most valuable street" made out of either wood, clay or stone.
But I have no idea what a road is or much less how to construct one!
Short answer that may sound snarky:
A "path" is a card that says it is a path and has all the wordy text about getting bonus point for having the best.
The I deck has 3 minor improvement "path" cards. One requires 1(?) wood to build (wooden path), one requires 3(?) clay (clay street), one requires 5(?) stone (stone road). The only thing these cards do is give points at the end of the game. Whoever builds the 'best' of the 3, where stone>clay>wood, receives 2 bonus points.
You build these cards the same way as any other minor improvement action.
Did I miss anything?