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M1 between J6A and J7, Hertfordshire (Grid ref TL112046) C, Tom's Lane, Hertfordshire (Grid ref TL096035) A4147 between Greenacres, Hemel Hempstead and King Harry Lane roundabout, Hertfordshire (Grid ref TL100060) M25 between J21A and J21, Hertfordshire (Grid ref TL125031) M25 between J20 and J21, Hertfordshire (Grid ref TL100029) M1 between J6 and J6A, Hertfordshire (Grid ref TL118024) A405 between M25 and Tippendell Lane, St Albans, Hertfordshire (Grid ref TL136039) A405 between M1 and M25, Hertfordshire (Grid ref TL119022) A405 between Tippendell Lane and M10, Hertfordshire (Grid ref TL140046) M1 between J7 and J8, Hertfordshire (Grid ref TL097070) A414 between J7 and J8, Hertfordshire (Grid ref TL095071) 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, King Harry Lane, Hertfordshire (Grid ref TL136064) A4147 between King Harry Lane roundabout and A5183, Hertfordshire (Grid ref TL132070) A5183 between M10 and A1081, Hertfordshire (Grid ref TL142056) U, Stroma Close, Hertfordshire (Grid ref TL081060) A5183 between Park Street Lane and M10, Hertfordshire (Grid ref TL146045) M1 between A414 and M1 (8), Hertfordshire (Grid ref TL091076) A414 between A414 and M1 (8), Hertfordshire (Grid ref TL091076)