- A412 between Long Lane and A404, Hertfordshire (Grid ref TQ050941)
- U, Uxbridge Road, Hertfordshire (Grid ref TQ050941)
- U, Windsor Way, Hertfordshire (Grid ref TQ044944)
- 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)
- A412 between A404 and A4178, Hertfordshire (Grid ref TQ060947)
- U, Shepherd's Lane, Hertfordshire (Grid ref TQ038945)
- U, The Cloisters, Hertfordshire (Grid ref TQ061945)
- A412 between A412 Denham Way and Long Lane, Hertfordshire (Grid ref TQ039935)
- M25 between J17 and J18, Hertfordshire (Grid ref TQ038950)
- A412 between A412 Uxbridge Rd and M25, Hertfordshire (Grid ref TQ033939)
- A404 between M25 and A412, Hertfordshire (Grid ref TQ050958)
- A404 between A4145 and Hertfordshire boundary, Hertfordshire (Grid ref TQ070928)
- A4145 between A404 and Chenies Way, Watford, Hertfordshire (Grid ref TQ077940)
- C, Stag Lane, Hertfordshire (Grid ref TQ024952)
- M25 between Hertfordshire boundary and J17, Hertfordshire (Grid ref TQ023929)
- U, Dulwich Way, Hertfordshire (Grid ref TQ073959)
- C, Lower Road, Hertfordshire (Grid ref TQ026959)
- A412 between Hertfordshire boundary and A412 split, Hertfordshire (Grid ref TQ030917)