Driving from Anchorage to Whittier to play in Prince William Sound? You’ll go through Anton Anderson Memorial Tunnel—the longest (2.5 miles) highway tunnel in North America, and the first designed for -40 Fahrenheit temperatures and 150 mph winds!
The one-lane tunnel must be shared by cars and trains traveling in both directions, and it usually needs to be aired out in between trips (with jet turbine ventilation, another first!). This unique design that enables a single lane of traffic to travel directly over the railroad track saved tens of millions of dollars over the cost of constructing a new tunnel.
The one-way toll for a private vehicle starts at $12.