Let’s take the VII from Londinium to Letocetum.
Cartographer Sasha Trubetskoy didn’t set out to create a subway-style map of the Roman roads of Britain—not specifically. He had seen plenty of fantasy transit maps online and, he says, “I figured I could do better.” He just needed a subject, and he landed on ancient Rome, which no one had tackled before, despite its extensive network of roads across its vast empire.
His first fantasy transit map covered the whole empire.
After he published it, fans clamored for another installment, specific to the network in Britain.