The short stub of highway marked west of Colletts Bridge Lane is incorrectly shown as public highway. It is a privately owned field entrance which has a permeable paving grid in order to allow Anglian Water vehicles to park whilst servicing the Sewage Treatment Works located immediately south of this location.  Please remove the indication that it is public road from your map.  This can be confirmed by examining the highways records at Cambridgeshire County Council adopted highways map.