- M25 between J21A and J22, Hertfordshire (Grid ref TL162027)
- B556, Harper Lane, Hertfordshire (Grid ref TL174023)
- U, Shenley Lane, Hertfordshire (Grid ref TL173037)
- B556, Bell Lane, Hertfordshire (Grid ref TL181027)
- U, High Street, Hertfordshire (Grid ref TL177043)
- A5183 between Park Street Lane and M10, Hertfordshire (Grid ref TL146045)
- A414 between M10 and A1081, Hertfordshire (Grid ref TL150048)
- A1081 between M25 Jct 22 and A414, Hertfordshire (Grid ref TL185040)
- U, Nightingale Lane, Hertfordshire (Grid ref TL174050)
- A5183 between A411 and Park Street Lane, St Albans, Hertfordshire (Grid ref TL163000)
- A1081 between B556 W and M25 (midpoint), Hertfordshire (Grid ref TL190032)
- A405 between M25 and Tippendell Lane, St Albans, Hertfordshire (Grid ref TL136039)
- U, Williams Way, Hertfordshire (Grid ref TQ169999)
- A405 between Tippendell Lane and M10, Hertfordshire (Grid ref TL140046)
- M10 between M1(7) and J1, Hertfordshire (Grid ref TL142051)
- A414 between M1 Junction 7 and Roundabout A414, A5183 and A405, Hertfordshire (Grid ref TL142051)
- U, Newberries Avenue, Hertfordshire (Grid ref TQ171996)
- U, School Lane, Hertfordshire (Grid ref TL133010)
- U, St Vincent Drive, Hertfordshire (Grid ref TL165061)
- A1081 between A414 and A5183, Hertfordshire (Grid ref TL160061)