Today I found out what exactly a pony truss is. I had heard the term before, but never understood what it meant.In fact, it is quite simple. A pony truss is a truss bridge which allows traffic through the truss, but the top of the bridge is not joined together with cross braces.

Example of a real pony truss bridge:

Any truss bridge can be a pony truss. But not many are being made anymore (if any?), so chances are small that you will actually see one. Thanks to Historic Bridges of Iowa for this tip.

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