Roads & motorways
Note: there are too many entries in this category and all its subcategories combined. To obtain a list of structures please go through one of the subcategories.
There currently is no long description, though one is being prepared.
There currently is no relevant literature listed.
USA (1972), added on 06/01/2015
USA, added on 06/01/2015
Italy (2015), added on 07/10/2014