- U, Dulwich Way, Hertfordshire (Grid ref TQ073959)
- U, Baldwins Lane, Hertfordshire (Grid ref TQ077960)
- A412 between A404 and A4178, Hertfordshire (Grid ref TQ060947)
- U, The Cloisters, Hertfordshire (Grid ref TQ061945)
- A4145 between A404 and Chenies Way, Watford, Hertfordshire (Grid ref TQ077940)
- A412 between A404 Riverside Drive and A404 Chorleywoood Rd, Hertfordshire (Grid ref TQ056946)
- U, The Mount, Hertfordshire (Grid ref TQ053949)
- A404 between A412 and A4145, Hertfordshire (Grid ref TQ060940)
- A404 between M25 and A412, Hertfordshire (Grid ref TQ050958)
- U, Himalayan Way, Hertfordshire (Grid ref TQ099954)
- A4145 between Chenies Way and A4178 roundabout, Hertfordshire (Grid ref TQ100957)
- U, Uxbridge Road, Hertfordshire (Grid ref TQ050941)
- A412 between Long Lane and A404, Hertfordshire (Grid ref TQ050941)
- C74, Sarratt Road, Hertfordshire (Grid ref TQ051980)
- A404 between A4145 and Hertfordshire boundary, Hertfordshire (Grid ref TQ070928)
- M25 between J18 and J19, Hertfordshire (Grid ref TQ050980)
- A411 between Courtlands Drive and A412, Hertfordshire (Grid ref TQ100976)
- U, Windsor Way, Hertfordshire (Grid ref TQ044944)
- A4178 between A411 and A412, Hertfordshire (Grid ref TQ105965)
- A4125 between B4542 and A411, Hertfordshire (Grid ref TQ100939)