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A1 between J3 and J4, Hertfordshire (Grid ref TL224099) A1001 between A1057 and A1M / A414 / A6129, Hertfordshire (Grid ref TL225100) A414 between A1M / A1001 / A6129 and A1000 (midpoint), Hertfordshire (Grid ref TL229102) A6129 between A1M / A1001 / A414 and B197, Hertfordshire (Grid ref TL227110) C, Beaconsfield Road, Hertfordshire (Grid ref TL231089) B6426, Cavendish Way, Hertfordshire (Grid ref TL221084) A1000 between A414 (midpoint) and A1000 Mill Green Lane, Hertfordshire (Grid ref TL239099) A414 between A1000 (midpoint) and A1000 Mill Green Lane, Hertfordshire (Grid ref TL240097) A1000 between A1000 Mill Green Lane and A6129, Hertfordshire (Grid ref TL240101) B197, Great North Road, Hertfordshire (Grid ref TL223116) A1000 between A1001 and A414W, Hertfordshire (Grid ref TL230080) A1 between J4 and J5, Hertfordshire (Grid ref TL224120) A1057 between Poplar Avenue and A1001, Hertfordshire (Grid ref TL210082) A1001 between A1(M) and A1057, Hertfordshire (Grid ref TL212080) A6129 between B197 and A1000, Hertfordshire (Grid ref TL235120) U, Deerswood Avenue, Hertfordshire (Grid ref TL227074) A414 between A1000 Mill Green Lane and B1455 Holwell Lane, Hertfordshire (Grid ref TL249100) U, Applecroft Road, Hertfordshire (Grid ref TL229125) A1000 between A6129 and B195 W, Hertfordshire (Grid ref TL240121) U, Travellers Lane, Hertfordshire (Grid ref TL225069)