For more than 77 years, Traylor has provided single-source, comprehensive, cutting-edge construction and design-build services to public works agencies throughout North America. Traylor capitalizes on state-of-the-art technology for its soft ground, hard rock, and drill and shoot tunnel projects worldwide. They have successfully completed more than 115 tunneling projects, including two of the most technically demanding EPB tunnels in the United States, and well over 115 miles of tunnels utilizing tunnel boring machines (TBMs). Their underground structural services include tunnel boring machine tunnels, drill and blast tunnels, and precast tunnel segments.