- A404 between Hertfordshire boundary and road from North Hill, Hertfordshire (Grid ref TQ026975)
- A404 between road from North Hill, Chorleywood and M25, Hertfordshire (Grid ref TQ033967)
- C, Lower Road, Hertfordshire (Grid ref TQ026959)
- U, Blackettswood Drive, Hertfordshire (Grid ref TQ019960)
- A404 between Church Grove, Little Chalfont and Buckinghamshire boundary, Buckinghamshire (Grid ref TQ010978)
- C, Stag Lane, Hertfordshire (Grid ref TQ024952)
- M25 between J18 and J19, Hertfordshire (Grid ref TQ050980)
- C74, Sarratt Road, Hertfordshire (Grid ref TQ051980)
- A404 between A404 Woodside Rd roundabout and Church Grove, Little Chalfont, Buckinghamshire (Grid ref TQ000977)
- M25 between J17 and J18, Hertfordshire (Grid ref TQ038950)
- A404 between M25 and A412, Hertfordshire (Grid ref TQ050958)
- U, Burtons Lane, Buckinghamshire (Grid ref SU996968)
- U, Shepherd's Lane, Hertfordshire (Grid ref TQ038945)
- U, Flaunden Lane, Hertfordshire (Grid ref TL023008)
- U, Windsor Way, Hertfordshire (Grid ref TQ044944)
- U, Horse Hill, Buckinghamshire (Grid ref TL004003)
- A412 between A412 Uxbridge Rd and M25, Hertfordshire (Grid ref TQ033939)
- U, Coke's Lane, Buckinghamshire (Grid ref SU990967)
- U, The Mount, Hertfordshire (Grid ref TQ053949)
- A412 between Long Lane and A404, Hertfordshire (Grid ref TQ050941)