This road is pure speculation at the moment, but David Ratledge’s account on his Roman Roads in Lancashire webpage is very persuasive. Here is an extract:-
A few pieces of evidence point to the existence of this road. On the direct route there are 4 occurrences of ‘street’ or ‘causeway’ names. The first at Rivington was regarded by Birtill, the Chorley historian, as a Roman road continuing further north along Heapey Fold Lane. The next is at Causeway House Farm at Heapey. Finally at Causeway Farm near Riley Green – an old raised road is reported descending to a ford across the River Darwen below Lodge Farm – it apparently known as the “Roman Ford”. It is lost across the golf course but appear s further on across Long Lane at Cabin Hill/Woodcock Hill (Ref: Dixon – Journeys through Brigantia – Book 11). Another Causeway Farm is located at Osbaldeston. The direction of all these is towards Ribchester.
Another of David’s suggestions is the Common at Adlington which points directly towards Wigan going through Arley and Red Rock. In 2015, our attention was drawn to culvert under Wingates Road at the bottom of Leyland Mill Lane which had striking similarities to culverts seen under known Roman roads in north Lancashire. You can see details of our site visit here.
Earlier this year Mrs Pendlebury, who lives on Toddington Lane in Haigh, contacted us regarding a Roman milestone near her house which had recently been broken. Her claim that it was Roman came from her belief that the lane itself was Roman. We therefore decided we must investigate. You can see details of investigations here.