NASG Dispatch Articles: Structures - Tunnels
Build a Backdrop Viaduct
Issue:
2019 #5 September
Page:
32
Author:
Joe Kimber
Description:
The author describes how he built a backdrop viaduct out of 1-inch thick foam insulation board.
PRR Highway Underpass at Cresson, PA
Issue:
1996 #5 October
Page:
38
Author:
Jeff Madden
Description:
A photo and design diagrams of this vehicular underpass.