- A5123 between A45 and A5123, Northamptonshire (Grid ref SP749600)
- A5123 between A45 and A43, Northamptonshire (Grid ref SP749602)
- A5123 between A43 and A508, Northamptonshire (Grid ref SP752601)
- A5123 between A508 Bridge Street and A508 Cattle Market Road, Northamptonshire (Grid ref SP754600)
- A5123 between A4500 and A428/A508, Northamptonshire (Grid ref SP754609)
- A5123 between A508 and A428, Northamptonshire (Grid ref SP757601)
- A5123 between A428 and A4500, Northamptonshire (Grid ref SP759603)
- A5123 between A4500 and A5095, Northamptonshire (Grid ref SP761610)
- A5123 between A5095 and A5101, Northamptonshire (Grid ref SP770625)
- A5123 between A5101 and A43/A5076, Northamptonshire (Grid ref SP772630)