Pittsburgh says: Oh no, what about the cars?
Some of us say: Oh yes, let's ride through the closed tunnels.
My wife Karen and I joined a few like-minded miscreants (Colleen & Marko, Joanne, Ben) at the RedWhiteBlue store on 51 and rode into the closed tunnel. There was a gendarme on station watching the car traffic, but we managed to turn into the closed-inbound tunnel without arousing him. Fortunately, the taxpayers provide webcams that assist in planning:
The ride though the tunnel was excellent. Cooler than the outside, a bit of a breeze, well-lit, clean surface. In fact, I should ride there more often.
We stopped in the middle to take a picture:
When in doubt, the guidance is: Ride Toward the Light:
Out of the tunnel, Turn Right on McCardle, Turn Left on Arlington, descend to East Carson Street. It was as pleasant as could be. Highly recommended. I really appreciate a tribe that comes out to break laws together.