- U, Maylands Road, Hertfordshire (Grid ref TQ112929)
- U, Ashridge Drive, Hertfordshire (Grid ref TQ113924)
- U, Caldwell Road, Hertfordshire (Grid ref TQ119926)
- U, Hayling Road, Hertfordshire (Grid ref TQ104935)
- A4125 between Hertfordshire boundary and B4542, Hertfordshire (Grid ref TQ102920)
- A4125 between B4542 and A411, Hertfordshire (Grid ref TQ100939)
- A4125 between A404 and Hillingdon boundary, Hillingdon (Grid ref TQ100917)
- U, Carew Road, Hillingdon (Grid ref TQ096916)
- U, The Fairway, Hertfordshire (Grid ref TQ092927)
- U, Hillside Gardens, Hillingdon (Grid ref TQ104910)
- U, Albury Drive, Harrow (Grid ref TQ112908)
- A4008 between Hertfordshire boundary and A4008 split, Hertfordshire (Grid ref TQ120948)
- U, Sandy Lodge Way, Hillingdon (Grid ref TQ090920)
- A4125 between A4178 and A411/A4008, Hertfordshire (Grid ref TQ115952)
- A410 between A404 and A4008, Harrow (Grid ref TQ130912)
- A404 between Elm Park Rd and A410, Harrow (Grid ref TQ120906)
- U, Alandale Drive, Hillingdon (Grid ref TQ106904)
- A4008 between A410 and Harrow boundary, Harrow (Grid ref TQ136920)
- A4008 between A4008 split and A411/A4125, Hertfordshire (Grid ref TQ119953)
- A404 between A4125 and Hillingdon boundary, Hillingdon (Grid ref TQ100906)