It's not just old maps that can be wrong , Modern ones can also suffer. When someone makes a mistake on an adjustment.
My point, In our borough there is an old road, It has to be a right of way. But it is not, instead it is shown on borough maps as private?
Reason someone cocked up. At some point.
The road was fine up until it was crossed on the level by a railway. Still fine a crossing was installed and a keepers house to staff it was put in.
And a lane was altered to run along side the railway line and come out next to the keepers cottage rather than have a second crossing
Later it was decided that the traffic on the road was too heavy and a flyover was installed. the crossing was closed and the lane that had been altered to run along side the line was diverted again to come out at the bottom of the slope for the flyover.
Now somehow the 2 sections of old road that ran to the old crossing gates are no longer under public highways and listed as private, and the lane that has been diverted 2 times (And only serves the back entrance of a farm which even the farmer does not use and has padlocked and chained his gates to stop fly tipping) is shown as public under the highways map.
Great when someone from highways does not know how to read a map and when marking up the new one put the labels on the wrong roads.
So now the old road with Houses, Farm and the Old Keepers Cottage is not cared for by highways any longer and is so overgrown to the point that it is now almost covering the old centre line markings (Even though we have to go down it with a bin lorry) but the unused farmers lane is. Re Surfaced, Gritted, Swept, Litter Picked, Cleaned of Fly Tipping etc .