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M25 between J21A and J21, Hertfordshire (Grid ref TL125031) M1 between J6 and J6A, Hertfordshire (Grid ref TL118024) A405 between M1 and M25, Hertfordshire (Grid ref TL119022) A405 between M25 and Tippendell Lane, St Albans, Hertfordshire (Grid ref TL136039) M1 between J6A and J7, Hertfordshire (Grid ref TL112046) A405 between Tippendell Lane and M10, Hertfordshire (Grid ref TL140046) A405 between A412 and M1, Hertfordshire (Grid ref TL117010) U, School Lane, Hertfordshire (Grid ref TL133010) M25 between J20 and J21, Hertfordshire (Grid ref TL100029) A5183 between Park Street Lane and M10, Hertfordshire (Grid ref TL146045) 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) C, Tom's Lane, Hertfordshire (Grid ref TL096035) M1 between J5 and J6, Hertfordshire (Grid ref TL123002) A414 between M10 and A1081, Hertfordshire (Grid ref TL150048) A5183 between M10 and A1081, Hertfordshire (Grid ref TL142056) A405 between A41 and A412, Hertfordshire (Grid ref TL110004) 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)