It follows the land over chalk and sand, crossing the hills on its way to the sea.
While Peddars Way has been more or less preserved since the Romans built it 2,000 years ago to carry their armies and their goods to and from the Norfolk coast, many more of their roads have been lost over the centuries since the legions departed from our shores.
Now the author of a new book which uncovers a forgotten route in East Anglia believes we could be about to rediscover many more.
In The Road: A Story of Romans and Ways to the Past, Christopher Hadley goes in search of a lost 20-mile section between Braughing, in Hertfordshire and Great Chesterford, in Essex.
"There are Roman roads all around us," he said. "Most people live within a few miles of one. There might even be one running under their garden."
Peddar's Way and the Pye Road, which led from Colchester to the Roman regional capital of Caistor, near Norwich are well-known and documented.
But what of the smaller routes that fed troops and trade into and out of these main arteries - such as those believed to have existed connecting Thetford and Stonebridge, Saham Toney and Ashill, or the route of which traces have been found east of Brancaster?
Historians are now studying LIDAR (light detection and ranging) data originally used for mapping flood risk by the Environment Agency to look for evidence of long-lost roads.
"The science of it, the archaeology of it's fascinating," said Mr Hadley, who believes there has never been a better time for lovers of Roman roads.
"Roman roads were quite amazing things, they tell the story of the invasion.
"There's just something utterly beguiling about them, especially the lost ones."
Road building began with the invasion of AD43, a little over 20 years before Peddars Way reached Holme, which may back then have been a port.
Metalled routes which could carry wheeled traffic in all weathers had reached all four corners of the conquered country.
"And the Romans keep marching, surveying, laying out and engineering roads," writes Mr Hadley.
"Establishing supply lines from the harbours to the marching camps and forts, a network gradually took shape from individual roads built for a specific military purpose – both a symbol and a concrete expression of Roman imperial might."
Some lived on into modern times to become parts of the road network. Other stretches were lost.
"Time and weather erased these Roman labours," adds Mr Hadley. "They rotted the bridges and brought down trees across the route so that travellers went a different way round.
"The clay itself began to swallow lengths of the road, drawing its hoggin back into the land.
"When the crossing places slipped and drifted, the road lost its purposefulness, its directness."
Carters found easier fords or kinder gradients. Materials were taken away for other building projects. Often nothing on the surface remains.
Peddars Way was built in around AD61. The road stretched 46 miles from Knettishall Heath, near Thetford, to Holme.
Long swathes remain today, which are mainly the preserve of the hiker, the biker and the occasional off-roader.
Traffic is just enough to keep the route open until it peters out into the path which leads across the golf course at Old Hunstanton to the beach.
Roman roads are not the only long-lost routes in the spotlight, with research under way into so-called postman's paths used by delivery workers in rural areas before the advent of vans and ancient sunken lanes or holloways across the countryside.
The Road: A Story of Romans and Ways to the Past by Christopher Hadley. William Collins, £20.
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