Saturday, November 8, 2025

The Roman Empire’s Vast Road Network—186,000 Miles of It—Has Just Been Mapped in a New Digital Atlas

Every­where you look, you can find traces of the ancient Roman civ­i­liza­tion from which the mod­ern West descends. That’s espe­cial­ly true if you hap­pen to be look­ing in Europe, though echoes of Latin make them­selves heard in major lan­guages used all over the world. Take, for exam­ple, the com­mon Eng­lish word itin­er­ary, mean­ing a planned route for trav­el, which descends from iter, the Latin word for a jour­ney, route, or path. The Romans even­tu­al­ly spoke of itin­er­aria, which meant more or less the same thing as we do when we speak of our trav­el itin­er­aries. Now, bridg­ing these dis­tant eras, we have Itiner‑e, a new online map of ancient Rome’s road net­work, the most com­pre­hen­sive yet.

Orig­i­nal­ly envi­sioned as a kind of “Google Maps for Roman roads,” Itiner‑e is a project of Tom Brugh­mans of Aarhus Uni­ver­si­ty, and Pau de Soto Caña­mares and Adam Pažout of the Autonomous Uni­ver­si­ty of Barcelona. Its users can dig­i­tal­ly explore near­ly 300,000 kilo­me­ters of roads laid across the vast Roman Empire at its height in the mid-sec­ond cen­tu­ry — or at least as much of that net­work as edu­cat­ed guess­es can recon­struct.

Researchers can only be sure about less than three per­cent of the net­work, with anoth­er sev­en per­cent of ancient Roman roads doc­u­ment­ed in exis­tence if not in pre­cise loca­tion. Regard­less, Itiner‑e is based on an unprece­dent­ed­ly wide (and open) dataset, which incor­po­rates topo­graph­ic map­ping, satel­lite imagery and cen­turies of his­tor­i­cal records.

Among Itin­er-e’s many fea­tures is a con­fi­dence rat­ing, which shows just how con­fi­dent we can be that any giv­en road actu­al­ly looked like it does on the map. You can also view the whole thing in 3D to get a sense of the ele­va­tions involved in con­struc­tion and trav­el of the net­work; use a rout­ing tool to deter­mine sug­gest­ed routes around the empire “by foot, ox cart or don­key”; and even check satel­lite imagery to find still-extant parts of Roman roads and draw com­par­isons with the same parts of the world today. Though a fair few major Roman roads have evolved into cur­rent routes for trains and auto­mo­biles, we can’t exact­ly trav­el on them in the same way the Romans did. Still, when next you plan a Euro­pean itin­er­ary of your own, con­sid­er punch­ing it in to Itiner‑e and see­ing how the jour­ney most like­ly would’ve been made 1,875 years ago.

Relat­ed Con­tent:

How the Ancient Romans Built Their Roads, the Life­lines of Their Vast Empire

The Roads of Ancient Rome Visu­al­ized in the Style of Mod­ern Sub­way Maps

A Map Show­ing How the Ancient Romans Envi­sioned the World in 40 AD

Built to Last: How Ancient Roman Bridges Can Still With­stand the Weight of Mod­ern Cars & Trucks

The Roman Roads and Bridges You Can Still Trav­el Today

Plan Your Trip Across the Roads of the Roman Empire, Using Mod­ern Web Map­ping Tech­nol­o­gy

Based in Seoul, Col­in Marshall writes and broad­casts on cities, lan­guage, and cul­ture. His projects include the Sub­stack newslet­ter Books on Cities and the book The State­less City: a Walk through 21st-Cen­tu­ry Los Ange­les. Fol­low him on the social net­work for­mer­ly known as Twit­ter at @colinmarshall.


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