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M1 between J6 and J6A, Hertfordshire (Grid ref TL118024) A405 between M1 and M25, Hertfordshire (Grid ref TL119022) M25 between J21A and J21, Hertfordshire (Grid ref TL125031) A405 between A412 and M1, Hertfordshire (Grid ref TL117010) M25 between J20 and J21, Hertfordshire (Grid ref TL100029) U, School Lane, Hertfordshire (Grid ref TL133010) A405 between A41 and A412, Hertfordshire (Grid ref TL110004) C77, Hill Farm Avenue, Hertfordshire (Grid ref TL101009) M1 between J5 and J6, Hertfordshire (Grid ref TL123002) M1 between J6A and J7, Hertfordshire (Grid ref TL112046) U, Garston Lane, Hertfordshire (Grid ref TL120000) A405 between M25 and Tippendell Lane, St Albans, Hertfordshire (Grid ref TL136039) A412 between A41(T) and A405(T), Hertfordshire (Grid ref TL114000) C, Tom's Lane, Hertfordshire (Grid ref TL096035) C, Sheepcot Lane, Hertfordshire (Grid ref TQ111999) A405 between Tippendell Lane and M10, Hertfordshire (Grid ref TL140046) A41 between A412 and A405, Hertfordshire (Grid ref TQ100995) A41, Abbots Langley, Hertfordshire (Grid ref TQ094999) U, Hazelbury Avenue, Hertfordshire (Grid ref TL084013) U, Hazelwood Lane, Hertfordshire (Grid ref TL085011)