In the first picture, you can see the cage around the tunnel entrance on the north side of Admiral. The door to the cage was closed, and I didn't park the car to see if I could open it.
The second picture is a long shot across Admiral, showing the cages on both sides. They seem to be in decent condition, but I don't know if they're still being used, or even if the cages are unlocked.I've posted this photo before, but here's the tunnel entrance in Chelsea, OK. You can barely see the identical entrance on the other side of the road. I've always been fascinated by the concept of needing these underground passages to get across Route 66, I guess because it reminds me that, in it's heyday, the road carried bumper to bumper traffic at times.