I have been a member of this board for many years and back when I first started reading the boards I was always warned when taking a cab from the airport to the strip tell the driver no tunnel. Well, I've actually never taken a cab in Vegas. I always rent a car and have become pretty good at navigating the area. But, it just occurred to me that I have never come across the tunnel. Where is it? Is it still in use? Is there ever a good time to use it?