Caltrans Cable Compression San Francisco, CA
1:1 scale 30" x 24" x 6" (dia. 30", thickness 12")

This is an actual-size representation of a section of suspension cable as designed for the new San Francisco–Oakland Bay Bridge.  It shows not only the overall size of the cable, but also what happens to the individual cable strands when compressed to make one large cable.  This colorful section model is on exhibition at the Autodesk Design Museum in San Francisco.