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M25 between J19 and A41, Hertfordshire (Grid ref TQ080993) A41 between A417 / M25 JCT 19 SPUR and M25 JCT 20, Hertfordshire (Grid ref TL083000) A411 between M25 and Courtlands Drive, Hertfordshire (Grid ref TQ088990) M25 between J19 and J20, Hertfordshire (Grid ref TL074000) A41 between A411 / M25 J19 SPUR and A405, Hertfordshire (Grid ref TQ090995) A41, Hertfordshire (Grid ref TQ090995) A41, Hertfordshire (Grid ref TQ092996) U, Courtlands Drive, Hertfordshire (Grid ref TQ093990) A41, Hertfordshire (Grid ref TQ094996) U, Lauderdale Road, Hertfordshire (Grid ref TL084008) A41, Hertfordshire (Grid ref TQ095996) A41, Abbots Langley, Hertfordshire (Grid ref TQ094999) U, Hazelwood Lane, Hertfordshire (Grid ref TL085011) A41 between A412 and A405, Hertfordshire (Grid ref TQ100995) U, Hazelbury Avenue, Hertfordshire (Grid ref TL084013) U, Gallows Hill, Hertfordshire (Grid ref TL082014) U, Dell Road, Hertfordshire (Grid ref TQ102988) A4251 between Home Park Mill Link Rd, Kings Langley and M25 Jn20, Hertfordshire (Grid ref TL075017) U, Middle Way, Hertfordshire (Grid ref TQ105987) A411 between Courtlands Drive and A412, Hertfordshire (Grid ref TQ100976)