About 20 years ago, the government decided that the train as no longer a viable means of transportation and a way to move goods. The tracks were thus discarded. The result was heavier traffic on roads not designed for it and, now, these same roads are falling apart.
So much for wisdom of our government leaders.
Anyway, the pathways that were left are called abandoned railway corridors; ATV people love them, they are also great walking/biking trails. They are a decent place to get photos, too, as long as you can battle the black flies.