Snark aside, no... the roads definitely helped but the vast majority of such traffic for thousands of years was done over "ad-hoc" roads, basically a beaten path. A road implies a base - pavement, stones, etc. For most of the history of carriages they used mostly beaten paths. For most (all?) of the history of the automobile they used roads.
And I'm pretty sure that at any point in history probably until a century or two ago there were more "beaten paths" in the world than actual roads. Which isn't the case now.
My point stands, highlighted by the quote: "large". The network of roads built for carriages pales in comparison with the scale of the current infrastructure for cars. Which I assume was the whole point of the comparison in the comment I replied to. I just objected to the unnecessarily vague or misleading use of "large". There was a road infrastructure. Whether it was large depends on how creative you get with the reference point.
And I'm not even counting the fact that the infrastructure for cars includes far more than just the roads. In this context almost any other infrastructure of any kind built before the 20th century is absolutely tiny.