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B556, Harper Lane, Hertfordshire (Grid ref TL174023) B556, Bell Lane, Hertfordshire (Grid ref TL181027) M25 between J21A and J22, Hertfordshire (Grid ref TL162027) U, Shenley Lane, Hertfordshire (Grid ref TL173037) A1081 between B556 W and M25 (midpoint), Hertfordshire (Grid ref TL190032) A1081 between M25 Jct 22 and A414, Hertfordshire (Grid ref TL185040) U, High Street, Hertfordshire (Grid ref TL177043) U, Williams Way, Hertfordshire (Grid ref TQ169999) A5183 between A411 and Park Street Lane, St Albans, Hertfordshire (Grid ref TL163000) U, Newberries Avenue, Hertfordshire (Grid ref TQ171996) U, Nightingale Lane, Hertfordshire (Grid ref TL174050) C, London Road, Hertfordshire (Grid ref TQ194999) A414 between M10 and A1081, Hertfordshire (Grid ref TL150048) A5183 between Park Street Lane and M10, Hertfordshire (Grid ref TL146045) C, Coursers Road, Hertfordshire (Grid ref TL201046) U, St Vincent Drive, Hertfordshire (Grid ref TL165061) A1081 between A414 and A5183, Hertfordshire (Grid ref TL160061) A405 between Tippendell Lane and M10, Hertfordshire (Grid ref TL140046) A405 between M25 and Tippendell Lane, St Albans, Hertfordshire (Grid ref TL136039) U, School Lane, Hertfordshire (Grid ref TL133010)