The size of these blocks cannot be determined with any precision.

Indeed, in some cases the houses seem to have encroached on and distorted the street-plan.
Probably it would be true to say that the average block covered an acre and a half or an acre and two-thirds.[110] We do not know enough of the history of Caerwent to do more than guess how this street-plan came to it.

Very likely the same process of establishing a Roman-looking town for a local capital was adopted here as at Silchester.

Very likely the step was taken in the same period as at Silchester, that is, in the last thirty years of the first century.
Its occurrence is significant.

Caerwent lay remote in the far west, with nothing but garrisons beyond it.