We decided to go through this tunnel while touring Anchorage because where else do you share a one lane tunnel with trains? Very happy we did! But, be sure to allow enough time since it is one lane and not only do you have to share it with trains, but you have to share it with the cars leaving Whittier. On that note, Whittier is so beautiful! A great location! I don't remember if we had to pay to go through the tunnel, but if we did it was minimal.