London was the hub of the Roman road network in Britain The long mainly straight roads they built were set out by sighting between points on high ground. The actual lines being carefully chosen to avoid, if possible, steep inclines and marshy ground. Important Roman roads were usually about 24 ft wide, and were frequently set on an embankment about five ft high, known as an agger. Excavations of buried roads reveal the original surface layer of fine stone chippings. Stane Street connected London with Chichester, the tribal capital of Sussex. Its course is approximately that of the current road from Borough High Street via Kennington Park Road and Clapham Road. The modern road has deviated in places for example at Clapham Common South Side where it is almost quarter of a mile from the original Roman Road.
Roman Britain Website The Romans in Britain Website