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M1 between J8 and J9, Hertfordshire (Grid ref TL097105) B487, Hertfordshire (Grid ref TL102115) U, North Common Road, Hertfordshire (Grid ref TL101118) A5183 between B487 and B487, Hertfordshire (Grid ref TL110119) A5183 between A4147 and B487, Hertfordshire (Grid ref TL118101) M1 between A414 and M1 (8), Hertfordshire (Grid ref TL091076) A414 between A414 and M1 (8), Hertfordshire (Grid ref TL091076) C, Buncefield Lane, Hertfordshire (Grid ref TL086076) A414 between A4147 and M1, Hertfordshire (Grid ref TL088075) A4147 between B487 and A414, Hertfordshire (Grid ref TL078080) A5183 between B487 and A5, Hertfordshire (Grid ref TL100137) A4147 between Aycliffe Drive and B487, Hertfordshire (Grid ref TL068090) A414 between J7 and J8, Hertfordshire (Grid ref TL095071) M1 between J7 and J8, Hertfordshire (Grid ref TL097070) U, Hobletts Road, Hertfordshire (Grid ref TL069078) U, Fletcher Way, Hertfordshire (Grid ref TL063084) A4147 between A414 and Greenacres, Hertfordshire (Grid ref TL081067) A4147 between A4146 and Aycliffe Drive, Hemel Hempstead, Hertfordshire (Grid ref TL060088) U, Beesonend Lane, Hertfordshire (Grid ref TL135118) A5 between M1 (midpoint) and A5183, Hertfordshire (Grid ref TL092146)