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A405 between M1 and M25, Hertfordshire (Grid ref TL119022) M1 between J6 and J6A, Hertfordshire (Grid ref TL118024) M25 between J21A and J21, Hertfordshire (Grid ref TL125031) A405 between A412 and M1, Hertfordshire (Grid ref TL117010) U, School Lane, Hertfordshire (Grid ref TL133010) A405 between A41 and A412, Hertfordshire (Grid ref TL110004) M25 between J20 and J21, Hertfordshire (Grid ref TL100029) M1 between J5 and J6, Hertfordshire (Grid ref TL123002) U, Garston Lane, Hertfordshire (Grid ref TL120000) C77, Hill Farm Avenue, Hertfordshire (Grid ref TL101009) A412 between A41(T) and A405(T), Hertfordshire (Grid ref TL114000) C, Sheepcot Lane, Hertfordshire (Grid ref TQ111999) A405 between M25 and Tippendell Lane, St Albans, Hertfordshire (Grid ref TL136039) M1 between J6A and J7, Hertfordshire (Grid ref TL112046) C, Tom's Lane, Hertfordshire (Grid ref TL096035) A41 between A412 and A405, Hertfordshire (Grid ref TQ100995) A405 between Tippendell Lane and M10, Hertfordshire (Grid ref TL140046) A41, Abbots Langley, Hertfordshire (Grid ref TQ094999) A41 between Woodmere Ave and A412, Hertfordshire (Grid ref TQ120989) A41, Hertfordshire (Grid ref TQ095996)