Quote Originally Posted by Batahr
Knowing the EB team, this is done because there is evidence the Aedui/Arveni did build something better than dirt roads in history (not necessarily 'paved roads' as the romans used) and the casse didn't.
If I understood TA correctly, this is indeed the case. In Caesar's time the Gauls possessed over a more advanced road network than the Britons and Germans, although this only appeared late in the mod's time-frame. Unfortunately, the game does not allow to set different building requirements per faction, so the Gauls can construct them at the start, like all other factions that get them.

Quote Originally Posted by Catuvellauni
ok if there is evidence for them in gaul thats fine. I'm also just wondering if there is' any improvements in Celtic fortifications? e.g like the Murus Gallicus
The EB team has been planning this for a long time, but they lack a 3D modeler to actually implement it.