Hope I didn't mess this up. I came across this bridge type while researching some types of bridges for my layout. Does anyone know if there are outfits that market this type. Have'nt seen it in any of my info. I guess it is a Pennsylvania type structure. Actually if anybody has any links or info on model bridges available I'd appreciate it. Also maybe some help on wheather it would be wise to have this type of bridge for a duck under. I probably need more than one depending on what's available and what spans are out there. Anybody with some advise. I'd appreciate it. Thanks Robt.