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A1 between J1 and J2, Hertfordshire (Grid ref TL223050) U, Hall Gardens, Hertfordshire (Grid ref TL209057) A1001 between A1(M) and A1000, Hertfordshire (Grid ref TL220062) U, Station Road, Hertfordshire (Grid ref TL240042) C, Coursers Road, Hertfordshire (Grid ref TL201046) A1 between J2 and J3, Hertfordshire (Grid ref TL214065) A1000 between Dixons Hill Rd and A1001, Hertfordshire (Grid ref TL235064) U, Travellers Lane, Hertfordshire (Grid ref TL225069) C, Blue Bridge Road, Hertfordshire (Grid ref TL244033) A1001 between A1(M) jn2 and A1(M) jn3, Hertfordshire (Grid ref TL214070) A414 between A1081 and A1(M), Hertfordshire (Grid ref TL203067) A1000 between B158 and Dixons Hill Rd, Welham Green, Hertfordshire (Grid ref TL250055) U, Deerswood Avenue, Hertfordshire (Grid ref TL227074) A1081 between B556 W and M25 (midpoint), Hertfordshire (Grid ref TL190032) M25 between J23 and J22, Hertfordshire (Grid ref TL217011) A1000 between A1001 and A414W, Hertfordshire (Grid ref TL230080) A1001 between A1(M) and A1057, Hertfordshire (Grid ref TL212080) A1081 between M25 Jct 22 and A414, Hertfordshire (Grid ref TL185040) A1000 between B157 and B158, Hertfordshire (Grid ref TL259041) A1057 between Poplar Avenue and A1001, Hertfordshire (Grid ref TL210082)