Almost a century ago, engineers solved a problem that could have killed every driver passing through the Holland Tunnel. In his book, 'Highway Under the Hudson: A History of the Holland Tunnel,' Robert W. Jackson writes that the most difficult part of constructing the Holland Tunnel was not the tunnel itself. It was figuring out how to keep people alive once cars started driving through it. That question helped shape the tunnel we still use today.
A tunnel that nearly didn't work
