These signal bridges can be built in a variety of lengths and heights, with or without the catwalks as well. Just trim the parts to the length you need. I recommend assembling two girders at a time then gluing the pairs together for ease of assembly, as shown in the third photo.
Use the STLs labeled "complete" for the basic whole bridge to begin with.
Signal targets can be found here:
Lighted Signals
https://www.thingiverse.com/thing:4148296
Unlighted Signals
https://www.thingiverse.com/thing:4025702
| N_Signal_Bridge_Alt_Support.stl | 141.5KB | |
| N_Signal_Bridge_Catwalk.stl | 430.6KB | |
| N_Signal_Bridge_Complete.stl | 1.3MB | |
| N_Signal_Bridge_Complete_Alt_Support.stl | 1.8MB | |
| N_Signal_Bridge_Girder_A.stl | 209.5KB | |
| N_Signal_Bridge_Girder_B.stl | 107.1KB | |
| N_Signal_Bridge_Ladders.stl | 967.9KB | |
| N_Signal_Bridge_Support.stl | 46.2KB |
