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A1081 between B653 and The Common, Hertfordshire (Grid ref TL129150) C, Clarence Road, Hertfordshire (Grid ref TL130150) C, Hollybush Lane, Hertfordshire (Grid ref TL131151) B652, Station Road, Hertfordshire (Grid ref TL143147) U, Porters Hill, Hertfordshire (Grid ref TL143155) A1081 between B487 and B653, Hertfordshire (Grid ref TL136136) C, Roundwood Lane, Hertfordshire (Grid ref TL113149) U, Northfield Road, Hertfordshire (Grid ref TL142157) U, Pickford Hill, Hertfordshire (Grid ref TL147156) U, Grove Road, Hertfordshire (Grid ref TL144133) U, West Common Way, Hertfordshire (Grid ref TL134124) A1081 between Beesonend Lane and B487, Hertfordshire (Grid ref TL137125) C, Limbrick Road, Hertfordshire (Grid ref TL141125) A5183 between B487 and A5, Hertfordshire (Grid ref TL100137) U, Beesonend Lane, Hertfordshire (Grid ref TL135118) A1081 between The Common, Harpenden and Hertfordshire boundary, Hertfordshire (Grid ref TL100169) A5183 between B487 and B487, Hertfordshire (Grid ref TL110119) A5 between M1 (midpoint) and A5183, Hertfordshire (Grid ref TL092146) M1 between M1 (midpoint) and A5183, Hertfordshire (Grid ref TL092146) M1 between M1 (midpoint) and A5183, Hertfordshire (Grid ref TL091146)