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A4147 between Greenacres, Hemel Hempstead and King Harry Lane roundabout, Hertfordshire (Grid ref TL100060) M1 between J7 and J8, Hertfordshire (Grid ref TL097070) A414 between J7 and J8, Hertfordshire (Grid ref TL095071) M1 between A414 and M1 (8), Hertfordshire (Grid ref TL091076) A414 between A414 and M1 (8), Hertfordshire (Grid ref TL091076) U, Stroma Close, Hertfordshire (Grid ref TL081060) M1 between J6A and J7, Hertfordshire (Grid ref TL112046) A414 between A4147 and M1, Hertfordshire (Grid ref TL088075) A4147 between A414 and Greenacres, Hertfordshire (Grid ref TL081067) C, Buncefield Lane, Hertfordshire (Grid ref TL086076) C, Tom's Lane, Hertfordshire (Grid ref TL096035) C, Peascroft Road, Hertfordshire (Grid ref TL074061) U, Highwoodhall Lane, Hertfordshire (Grid ref TL074047) A4147 between B487 and A414, Hertfordshire (Grid ref TL078080) C127, Bennetts End Road, Hertfordshire (Grid ref TL069066) M25 between J20 and J21, Hertfordshire (Grid ref TL100029) A4147 between King Harry Lane roundabout and A5183, Hertfordshire (Grid ref TL132070) U, Hobletts Road, Hertfordshire (Grid ref TL069078) U, Oliver Rise, Hertfordshire (Grid ref TL064053) U, King Harry Lane, Hertfordshire (Grid ref TL136064)