What did the railroad tracks mean to Montag?

The railroad marked Montag's path, it was a magic charm that would lead him where he was going. 

Here was the path to wherever he was going. Here was the single familiar thing, the magic charm he might need a little while, to touch, to feel beneath his feet, as he moved on into the bramble bushes and the lakes of smelling and feeling and touching, among the whispers and the blowing down of leaves.