IBC 20-30: Upgrading a Tunnel for the 21st Century
Thomas R. Leckrone, P.E., N.C.T.I., Martha Averso, P.E., Brian Seip, P.E., N.C.T.I., and Ben Margerum, Gannett Fleming, Inc., Harrisburg, PA; Thomas Martin, P.E., Gall Zeidler Consultants, LLC, Ashburn, VA; James Stump, P.E., Pennsylvania Turnpike Commission, Harrisburg, PA