@djnelson75 @lukeyjohnson that's mysterious, especially since there's nothing for signage and roads STILL doesn't have a use.(which was in response to my post about the Revit Category Guide.)
— Sean David Burke (@seandburke) September 9, 2013
I was tempted to use the IFC roundtrip method to make some Road families in Revit. So, here they are for download:
You can't Schedule or Tag them normally, but you can use Material Tags, modify the Category and Subcategories using Object Styles, and view them in the Project Browser.
As always, use these "unsupported" methods with care...
Here are some similar posts:
Convert All Masses (including in-place Mass) to Generic Models via IFC
You can break Revit by making Room families
In-place and Component families of Stair and Railing Category