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M1 between J5 and J6, Hertfordshire (Grid ref TL123002) U, Garston Lane, Hertfordshire (Grid ref TL120000) A412 between A41(T) and A405(T), Hertfordshire (Grid ref TL114000) A405 between A412 and M1, Hertfordshire (Grid ref TL117010) C, Sheepcot Lane, Hertfordshire (Grid ref TQ111999) A405 between A41 and A412, Hertfordshire (Grid ref TL110004) A41 between Woodmere Ave and A412, Hertfordshire (Grid ref TQ120989) U, School Lane, Hertfordshire (Grid ref TL133010) A41 between A4008 / M25 J5 and Woodmere Ave, Hertfordshire (Grid ref TQ125984) U, Fuller Gardens, Hertfordshire (Grid ref TQ107988) A405 between M1 and M25, Hertfordshire (Grid ref TL119022) U, Westfield Avenue, Hertfordshire (Grid ref TQ117982) U, Middle Way, Hertfordshire (Grid ref TQ105987) A41 between A412 and A405, Hertfordshire (Grid ref TQ100995) M1 between J6 and J6A, Hertfordshire (Grid ref TL118024) C77, Hill Farm Avenue, Hertfordshire (Grid ref TL101009) U, Dell Road, Hertfordshire (Grid ref TQ102988) C, Radlett Road, Hertfordshire (Grid ref TQ117978) A41 between B462 and A4008 / M25 J5, Hertfordshire (Grid ref TQ131978) A41, Hertfordshire (Grid ref TQ095996)