- A4125 between B4542 and A411, Hertfordshire (Grid ref TQ100939)
- U, Hayling Road, Hertfordshire (Grid ref TQ104935)
- U, The Fairway, Hertfordshire (Grid ref TQ092927)
- U, Himalayan Way, Hertfordshire (Grid ref TQ099954)
- U, Maylands Road, Hertfordshire (Grid ref TQ112929)
- A4145 between Chenies Way and A4178 roundabout, Hertfordshire (Grid ref TQ100957)
- A4125 between Hertfordshire boundary and B4542, Hertfordshire (Grid ref TQ102920)
- U, Ashridge Drive, Hertfordshire (Grid ref TQ113924)
- A4125 between A4178 and A411/A4008, Hertfordshire (Grid ref TQ115952)
- U, Sandy Lodge Way, Hillingdon (Grid ref TQ090920)
- A4125 between A404 and Hillingdon boundary, Hillingdon (Grid ref TQ100917)
- U, St James Road, Hertfordshire (Grid ref TQ108959)
- A4178 between A4125 and A4145 roundabout, Hertfordshire (Grid ref TQ110958)
- U, Carew Road, Hillingdon (Grid ref TQ096916)
- A4008 between Hertfordshire boundary and A4008 split, Hertfordshire (Grid ref TQ120948)
- U, Caldwell Road, Hertfordshire (Grid ref TQ119926)
- U, Astons Road, Hertfordshire (Grid ref TQ082925)
- A4145 between A404 and Chenies Way, Watford, Hertfordshire (Grid ref TQ077940)
- A4145 between A4178 roundabout and A411, Hertfordshire (Grid ref TQ108961)
- A4008 between A4008 split and A411/A4125, Hertfordshire (Grid ref TQ119953)