- A55 between B4545 Kingsland Rd and A5154, Isle of Anglesey (Grid ref SH247819)
- A55 between A55/A5153 junction and Roundabout with A55/A5154, Isle of Anglesey (Grid ref SH249816)
- A55 between A5 and B4545 Kingsland Rd, Isle of Anglesey (Grid ref SH286791)
- A55 between A5 and A5, Isle of Anglesey (Grid ref SH310789)
- A55 between A4080 and A5, Isle of Anglesey (Grid ref SH345772)
- A55 between A5/A5114 and A4080, Isle of Anglesey (Grid ref SH415743)
- A55 between A5152 and A5/A5114, Isle of Anglesey (Grid ref SH475725)
- A55 between A5 and A5152, Isle of Anglesey (Grid ref SH510719)
- A55 between A5 and A5025, Isle of Anglesey (Grid ref SH530723)
- A55 between A5025 and A4080, Isle of Anglesey (Grid ref SH539717)
- A55 between Gwynedd boundary and A487, Gwynedd (Grid ref SH545705)
- A55 between A487 and A4087, Gwynedd (Grid ref SH550697)
- A55 between A4087 and A5, Gwynedd (Grid ref SH570694)
- A55 between A5 / A5122 and Gwynedd boundary, Gwynedd (Grid ref SH600700)
- A55 between Conwy boundary and A547, Conwy (Grid ref SH700762)
- A55 between A547 and A546, Conwy (Grid ref SH775785)
- A55 between A546 and A470 / A547, Conwy (Grid ref SH800773)
- A55 between A470T and A547, Conwy (Grid ref SH822787)
- A55 between A470 / A547 and A547 Llanddulas, Conwy (Grid ref SH900783)
- A55 between A547 and A55 main route, Conwy (Grid ref SH904784)
- A55 between A55 main route and A547, Conwy (Grid ref SH905783)
- A55 between A547 Llanddulas and A548, Conwy (Grid ref SH920781)
- A55 between A548 and A548, Conwy (Grid ref SH945784)
- A55 between A548 on-slip and A547 roundabout, Conwy (Grid ref SH950781)
- A55 between A547 and Conwy boundary, Conwy (Grid ref SH970763)
- A55 between Denbighshire boundary and A525W, Denbighshire (Grid ref SJ006753)
- A55 between A525W and A525E, Denbighshire (Grid ref SJ040749)
- A55 between A525E and Denbighshire boundary, Denbighshire (Grid ref SJ108757)
- A55 between Flintshire boundary and A5151 / A5026, Flintshire (Grid ref SJ120758)
- A55 between A5151 / A5026 and A5026, Flintshire (Grid ref SJ151760)
- A55 between A5026 and A5119, Flintshire (Grid ref SJ230698)
- A55 between A5119 and A494, Flintshire (Grid ref SJ255679)
- A55 between A494 and A550, Flintshire (Grid ref SJ291657)
- A55 between A550 and A5104, Flintshire (Grid ref SJ314634)
- A55 between A5104 and A55 slip, Flintshire (Grid ref SJ339630)
- A55 between A55T and A5104, Flintshire (Grid ref SJ345638)
- A55 between A55 split and Flintshire boundary, Flintshire (Grid ref SJ355632)
- A55 between West Cheshire boundary and A483, West Cheshire (Grid ref SJ360631)
- A55 between A483 and A41, West Cheshire (Grid ref SJ420636)
- A55 between M53 and A56, West Cheshire (Grid ref SJ433684)
- A55 between A41 and A51, West Cheshire (Grid ref SJ437663)
- A55 between A51 and M53, West Cheshire (Grid ref SJ437672)
- A55 between A5/A55 junction near pen-caledog and A55/A5153 junction, Isle of Anglesey (Grid ref TQ139647)