this is an InProgress 3D model for a 3 track signal bridge
Lionel's 450 is essentially a flat pressed metal folded design with few details that I tolerated until the MTH and Z-Stuff models appeared.
However, it never appeared to me that even those models possessed correct structural elements.
The model will be printed in parts; 1) end bents; 2) end bases: 3) center truss and two-level decking in two sections; and 4) ladder. The signal heads' wire piping not yet shown.
