- A427 between A6/A4304 and A6003, Northamptonshire (Grid ref SP800875)
- A427 between A6003 and A6014, Northamptonshire (Grid ref SP879884)
- A427 between A6014 and A6086, Northamptonshire (Grid ref SP889884)
- A427 between A6086 and A43, Northamptonshire (Grid ref SP910892)
- A427 between A43(T) and A6116, Northamptonshire (Grid ref SP917897)
- A427 between A427 and A47 WALDEN, Northamptonshire (Grid ref SP920899)
- A427 between Church St, Weldon and A43, Northamptonshire (Grid ref SP928897)
- A427 between Church St, Weldon and Stoke Hill/Mill Rd roundabout, Northamptonshire (Grid ref SP999887)
- A427 between Stoke Hill/Mill Rd roundabout and A605, Northamptonshire (Grid ref TL040880)