here's a screen cap of the hill street tunnel before it became a twin tunnel to accommodate vehicles as well as the p&e cars. I don't think i have ever seen a photo of when it was only a single tunnel before. The view is looking north from 1st street.
it is a screen cap from a great little movie detailing the hill street tunnels.
you can view the movie at youtube by clicking the source link below the photo
Source: Youtube -
http://www.youtube.com/watch?v=Bk2xh...eature=related