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C, Coursers Road, Hertfordshire (Grid ref TL201046) U, Hall Gardens, Hertfordshire (Grid ref TL209057) A1081 between M25 Jct 22 and A414, Hertfordshire (Grid ref TL185040) A1081 between B556 W and M25 (midpoint), Hertfordshire (Grid ref TL190032) A414 between A1081 and A1(M), Hertfordshire (Grid ref TL203067) A1 between J1 and J2, Hertfordshire (Grid ref TL223050) A1 between J2 and J3, Hertfordshire (Grid ref TL214065) U, High Street, Hertfordshire (Grid ref TL177043) A1001 between A1(M) and A1000, Hertfordshire (Grid ref TL220062) B556, Bell Lane, Hertfordshire (Grid ref TL181027) U, Nightingale Lane, Hertfordshire (Grid ref TL174050) A1001 between A1(M) jn2 and A1(M) jn3, Hertfordshire (Grid ref TL214070) U, Shenley Lane, Hertfordshire (Grid ref TL173037) C174, Colney Heath Lane, Hertfordshire (Grid ref TL180069) A1057 between Lyon Way, St Albans and Poplar Avenue, Hatfield, Hertfordshire (Grid ref TL200078) U, Travellers Lane, Hertfordshire (Grid ref TL225069) B556, Harper Lane, Hertfordshire (Grid ref TL174023) A1001 between A1(M) and A1057, Hertfordshire (Grid ref TL212080) A1057 between Poplar Avenue and A1001, Hertfordshire (Grid ref TL210082) M25 between J23 and J22, Hertfordshire (Grid ref TL217011)