The “Original Downtown Regional Connector?”: The 1954 Underground Bus Network Maps May 21, 2010 Click on the map to open it, and again to enlarge it. We wanted to follow up on yesterday’s post about the proposed underground express Share:Click to share on Facebook (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to share on Tumblr (Opens in new window)Click to share on Reddit (Opens in new window)Click to email a link to a friend (Opens in new window)Click to print (Opens in new window)