Known. A cobbled Roman road lay under the route of a new highway.
The road is on the Swabian Alb, south of Stuttgart, in Germany. It is about 2,000 years old. About 90 metres of it were found near Drackenstein. It once linked Rottweil and Heidenheim an der Brenz, two important places on the Roman frontier. The surface is cobbles on a packed base, sloped so water could run off. Cart ruts show years of heavy traffic. Finds include nails, roof tiles, pieces of tableware, and a bronze coin thought to show the emperor Domitian, who ruled from AD 81 to 96. The road is linked to the emperor Vespasian and the province of Germania Superior.
Tests are still meant to pin down how the road was built, and when people stopped using it.