In the original post
http://members3.boardhost.com/trafficgard/msg/1222907816.html Steve Hillyer identifies the barricades with the flashers and lanterns as Dietz No.341 barricades and were 48" long, the wooden one in the center may or may not be Dietz but seems about the same length as the No.341 and is good for reference anyway, it looks like every thing else in the scene are Dietz products.
Willis