Here is the text that usually accompanies the picture:

They had to build the animals (especially the elk)their own crossing because that was where the natural crossing was and after the highway was built there were far too many accidents. I understand it didn’t take the animals long to learn that this was their “road.”

The problem is that this is not quite the truth. Check out this link for information about the program referenced in the text of the email.

Apparently, this is just a regular ole railroad bridge for the Canadian Pacific Railway that serves the same purpose.