- A508 between Lathkill St and A4304, Leicestershire (Grid ref SP738870)
- A508 between A14(T) and Northamptonshire boundary, Northamptonshire (Grid ref SP738800)
- A508 between Leicestershire boundary and Lathkill St, Leicestershire (Grid ref SP739860)
- A508 between A5076 and Brampton Lane, Northamptonshire (Grid ref SP749645)
- A508 between A5199 and A5076, Northamptonshire (Grid ref SP751640)
- A508 between A5 and High St, Northamptonshire (Grid ref SP751499)
- A508 between A5095 and A5095, Northamptonshire (Grid ref SP751625)
- A508 between A5095 and A5199, Northamptonshire (Grid ref SP751632)
- A508 between Brampton Lane, Northampton and A14, Northamptonshire (Grid ref SP752699)
- A508 between A5123 and A5095, Northamptonshire (Grid ref SP752620)
- A508 between A43/A5123 and A428/A5123, Northamptonshire (Grid ref SP752609)
- A508 between A5123 and A5123, Northamptonshire (Grid ref SP754602)
- A508 between A508 split and A5123, Northamptonshire (Grid ref SP754599)
- A508 between A45 and A508 Cattle Market Rd, Northamptonshire (Grid ref SP754595)
- A508 between High St and M1, Northamptonshire (Grid ref SP754519)
- A508 between A508 split and A5123, Northamptonshire (Grid ref SP754599)
- A508 between M1 and London Rd slips (mid-junction), Northamptonshire (Grid ref SP756549)
- A508 between London Rd slips (mid-junction) and A45, Northamptonshire (Grid ref SP757572)