Study Maps 190,000 Miles of Roman Roads, Elevating Constantinople Over Rome

Q: If the most central ancient road in Italy completely bypassed Rome, where was it actually taking the empire's travelers?

It was mainly carrying travelers along the Adriatic side of Italy into the empire’s broader east–west corridor, not funneling them to Rome. The study says the most central road in Italy ran up the Adriatic coast and bypassed Rome altogether. In practical terms, that route linked Italian traffic to the peninsula’s northern and eastern connections — toward the Po Valley, cities such as Milan, and onward to the Balkans, Asia Minor and the eastern Mediterranean. That fits the researchers’ larger finding that the empire’s key overland spine was not Rome-centered. Instead, the strongest terrestrial corridor appears to have run from the North African coast through the Levant and Anatolia, crossed at Byzantium/Constantinople, and then continued westward through northern Italy and southern France. Within that system, the Adriatic route in Italy functioned as a through-road for empire-wide movement. So if a traveler was on Italy’s most central road, the destination was less likely to be Rome than the wider imperial network beyond it — especially the eastern provinces and the land bridge through Byzantium that tied Europe and Asia together. Rome remained the political and symbolic center, but not always the main intermediary for road traffic.

3 articles · Updated · Fox News · Sep 22

A Sept. 15 Nature Communications study found Rome was not uniquely central in the empire’s road system, with Constantinople emerging as a more important overland hub after the fourth century.
Researchers combined existing data into an empire-wide map covering roughly 190,000 miles of roads across Europe, the Middle East and North Africa, showing provincial capitals also played major roles in travel.
Tom Brughmans said the medieval proverb “All roads lead to Rome” should not be read literally; some regions, including Roman Britain, had roads that did not connect to Rome at all.
Taco Terpstra, who was not involved in the research, said the findings do not diminish Rome’s political and military primacy, but reflect how connectivity shifted once Constantinople became the de facto capital.
The study also reinforces that Roman roads were built as straight as terrain and technology allowed, though Terpstra said maritime routes remained the empire’s main and cheaper transport network.