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A41 between M25 JCT 20 and A414, Hertfordshire (Grid ref TL058031) A4251 between A414 and Nash Mills Lane, Hertfordshire (Grid ref TL061050) A4251 between Nash Mills Lane, Hemel Hempstead and Home Park Mill Link Rd, Kings Langley, Hertfordshire (Grid ref TL074020) A4251 between Home Park Mill Link Rd, Kings Langley and M25 Jn20, Hertfordshire (Grid ref TL075017) U, Highwoodhall Lane, Hertfordshire (Grid ref TL074047) U, Oliver Rise, Hertfordshire (Grid ref TL064053) A414 between A41 and A4251, Hertfordshire (Grid ref TL052054) A4251 between A4146 and A414, Hertfordshire (Grid ref TL050058) U, Gallows Hill, Hertfordshire (Grid ref TL082014) A414 between A4251 and A4146, Hertfordshire (Grid ref TL054060) A4146 between A4251 and A414, Hertfordshire (Grid ref TL050061) A4251 between B4505 and A4146, Hertfordshire (Grid ref TL045060) U, Hazelbury Avenue, Hertfordshire (Grid ref TL084013) U, Hazelwood Lane, Hertfordshire (Grid ref TL085011) C, Peascroft Road, Hertfordshire (Grid ref TL074061) M25 between J19 and J20, Hertfordshire (Grid ref TL074000) U, Lauderdale Road, Hertfordshire (Grid ref TL084008) A414 between A4146 and A4147, Hertfordshire (Grid ref TL060066) U, Waterhouse Street, Hertfordshire (Grid ref TL054067) A4251 between A41 and B4505, Hertfordshire (Grid ref TL034059)