The discovery points towards the town’s ancient history as a centre for settlement and trade, and provides evidence of further links to nearby settlements.
North Pennines Archaeology Ltd sent workers to the Whitemoor site to investigate the remains of the rail yard and establish whether the course of the Fen Causeway had been fully removed by the rail yard’s construction.
The archaeologists came across a 12 metre-wide road and an additional eight metre-wide road heading south-west of the junction. It is believed that this was built to meet an east-west road recently excavated at the County Council’s waste transfer facility at Melbourne Avenue.
Another possible road, though less well preserved, heads north-eastwards towards known settlements and the salterns in the Longhill Road area.
Kasia Gdaniec, of the Cambridgeshire County Council’s Historic Environment Team, said: “This has been a rare opportunity to investigate an unexpectedly well-preserved section of the Fen Causeway. It is the first time that a junction has been found in association with it.”