Since 1998, a programme of street test soundings has been carried out at Sagalassos (South-West Turkey) to investigate the urban development of the town and the evolution of its street network.1 Combined with the evidence from large-scale excavations, and geophysical and architectural surveys at the site, this research has painted an accurate picture of ancient street design in this Roman town. Given that the remains of late antique Sagalassos are particularly well-preserved, the evidence also casts light upon the maintenance of the urban infrastructure of this classical city, which gradually became a decaying town from the second half of the 6th c. A.D.
