Liberty Tunnel Arch Restoration with a Shotcrete Alternative The Liberty Tunnel provides a direct commuting route from the South Hills suburbs to downtown Pittsburgh, PA. By shotcreteweb|2022-02-16T16:47:55+00:00January 12th, 2015| Share This Story, Choose Your Platform! FacebookTwitterRedditLinkedInWhatsAppTumblrPinterestVkEmail About the Author: shotcreteweb