- M25 between J20 and J21, Hertfordshire (Grid ref TL100029)
- C, Tom's Lane, Hertfordshire (Grid ref TL096035)
- M1 between J6 and J6A, Hertfordshire (Grid ref TL118024)
- C77, Hill Farm Avenue, Hertfordshire (Grid ref TL101009)
- A405 between M1 and M25, Hertfordshire (Grid ref TL119022)
- M1 between J6A and J7, Hertfordshire (Grid ref TL112046)
- U, Hazelbury Avenue, Hertfordshire (Grid ref TL084013)
- U, Gallows Hill, Hertfordshire (Grid ref TL082014)
- U, Hazelwood Lane, Hertfordshire (Grid ref TL085011)
- M25 between J21A and J21, Hertfordshire (Grid ref TL125031)
- U, Lauderdale Road, Hertfordshire (Grid ref TL084008)
- A405 between A412 and M1, Hertfordshire (Grid ref TL117010)
- A4251 between Nash Mills Lane, Hemel Hempstead and Home Park Mill Link Rd, Kings Langley, Hertfordshire (Grid ref TL074020)
- A405 between A41 and A412, Hertfordshire (Grid ref TL110004)
- A4251 between Home Park Mill Link Rd, Kings Langley and M25 Jn20, Hertfordshire (Grid ref TL075017)
- A41, Abbots Langley, Hertfordshire (Grid ref TQ094999)
- A4147 between Greenacres, Hemel Hempstead and King Harry Lane roundabout, Hertfordshire (Grid ref TL100060)
- C, Sheepcot Lane, Hertfordshire (Grid ref TQ111999)
- U, Highwoodhall Lane, Hertfordshire (Grid ref TL074047)
- A41, Hertfordshire (Grid ref TQ095996)