- U, Penn Way, Hertfordshire (Grid ref TL230311)
- A6141 between A1(M) and Baldock Lane, Hertfordshire (Grid ref TL234310)
- A6141 between A1(M) and Weston Way, Hertfordshire (Grid ref TL237308)
- A6141 between Baldock Lane and A505, Hertfordshire (Grid ref TL228320)
- A505 between Stotwold Rd/Queenswood Drive and A6141, Hertfordshire (Grid ref TL223320)
- U, Quinn Way, Hertfordshire (Grid ref TL232322)
- A505 between A1(M) and Baldock Roundabout, Hertfordshire (Grid ref TL241312)
- U, Jackman's Place, Hertfordshire (Grid ref TL228324)
- C, Hertfordshire (Grid ref TL245305)
- C, Willian Road, Hertfordshire (Grid ref TL215304)
- A1 between J8 and J9, Hertfordshire (Grid ref TL230290)
- A1 between J9 and Hertfordshire boundary, Hertfordshire (Grid ref TL239330)
- A6141 between A505 and Weston Way, Hertfordshire (Grid ref TL247330)
- A505 between A6141 and A6141, Hertfordshire (Grid ref TL239335)
- U, Hertfordshire (Grid ref TL249331)
- C, Wilbury Road, Hertfordshire (Grid ref TL215336)
- U, Eastern Way, Hertfordshire (Grid ref TL221339)
- U, Grange Road, Hertfordshire (Grid ref TL217338)
- A505 between B656 and Stotwold Rd/Queenswood Drive, Hertfordshire (Grid ref TL200302)
- A507 between A505 and Wallington Rd, Hertfordshire (Grid ref TL250336)