I think I'm missing some kind of option, but it looks like it really takes Construction 50 to Pave a Road.
Paving a road is listed as something you can do at Construction 0. But consider that to Pave a Road you need a Mallet. A Mallet needs Bone Glue. Bone Glue needs Procurement 0. Procurement 0 needs Animal Lore 30. Animal Lore 30 needs a Coop. A Coop needs Construction 50.
Is this what is intended? I mean, for anyone following the first person to work up Construction, Bone Glue will be available and thus Mallets to use for Paving with Construction 0.
Or, am I missing an alternative path?