- A483 between M4 jn49 and B4297 Hendre Rd, Carmarthenshire (Grid ref SN578073)
- A483 between B4297 and Penygarn Rd, Carmarthenshire (Grid ref SN602104)
- A483 between A484 and M4, Swansea (Grid ref SS619980)
- A483 between Penygarn Rd and A474 Stryd Fawr (High St), Carmarthenshire (Grid ref SN620117)
- A483 between Aberlash Rd, Ammanford and B4556 Blaenau Rd, Carmarthenshire (Grid ref SN620150)
- A483 between B4620 Ffordd Cynore and A484, Swansea (Grid ref SS623970)
- A483 between A474 and Aberlash Rd, Carmarthenshire (Grid ref SN625130)
- A483 between B4556 and A476 HEOL CENNEN, Carmarthenshire (Grid ref SN627202)
- A483 between A476 and A40, Carmarthenshire (Grid ref SN627217)
- A483 between A4216 Station Rd and B4620 Ffordd Cynore, Swansea (Grid ref SS629960)
- A483 between A4118 Dyfatty St and A4216 Station Rd, Swansea (Grid ref SS650947)
- A483 between A4067 / A4217 and A4118, Swansea (Grid ref SS660935)
- A483 between Swansea boundary and A4217 / A4067, Swansea (Grid ref SS678930)
- A483 between Neath Port Talbot boundary and B4290, Neath Port Talbot (Grid ref SS700929)
- A483 between B4290 and M4 Jn42 eastern spur, Neath Port Talbot (Grid ref SS720934)
- A483 between M4 eastern spur (mid-junction) and A48, Neath Port Talbot (Grid ref SS729939)
- A483 between A40 and C-road south of Cynghordy, Carmarthenshire (Grid ref SN800386)
- A483 between C-road south of Cynghordy and Carmarthenshire boundary, Carmarthenshire (Grid ref SN825415)
- A483 between Powys boundary and B4358, Powys (Grid ref SN900496)
- A483 between B4358 and B4519, Powys (Grid ref SN940500)
- A483 between B4519 and A483 Park rd, Powys (Grid ref SO000514)
- A483 between A483 Bulith Wells and A470, Powys (Grid ref SO038511)
- A483 between A483 Bulith Wells and A470, Powys (Grid ref SO039509)
- A483 between A470 and A481, Powys (Grid ref SO044516)
- A483 between A481 and A4081 mid-intersection, Powys (Grid ref SO055600)
- A483 between A4081 mid-junction and A4081 Brookland Rd, Powys (Grid ref SO060614)
- A483 between B4356 and B4355, Powys (Grid ref SO084800)
- A483 between A4081 and A44, Powys (Grid ref SO084639)
- A483 between A44 and B4356, Powys (Grid ref SO100677)
- A483 between B4355 and Plantation Lane, Newtown, Powys (Grid ref SO100897)
- A483 between Plantation Lane and A489, Powys (Grid ref SO106910)
- A483 between A489 and B 4389, Powys (Grid ref SO128921)
- A483 between B4389 and B4386, Powys (Grid ref SO150936)
- A483 between B4386 and A490, Powys (Grid ref SO192999)
- A483 between A490 and A458, Powys (Grid ref SJ227063)
- A483 between A458 and A458, Powys (Grid ref SJ240084)
- A483 between A458 and B4393, Powys (Grid ref SJ247100)
- A483 between Powys boundary and Powys boundary, Powys (Grid ref SJ266209)
- A483 between Shropshire boundary and Shropshire boundary, Shropshire (Grid ref SJ267206)
- A483 between B4393 and Powys boundary, Powys (Grid ref SJ268200)
- A483 between Shropshire boundary and A495, Shropshire (Grid ref SJ280233)
- A483 between A495 and B5069, Shropshire (Grid ref SJ286250)
- A483 between A5 and A539, Wrexham (Grid ref SJ298419)
- A483 between B5069 and A5(T), Shropshire (Grid ref SJ300275)
- A483 between A539 and A5152, Wrexham (Grid ref SJ309445)
- A483 between A5152 and A525, Wrexham (Grid ref SJ309490)
- A483 between A525 and A541, Wrexham (Grid ref SJ318506)
- A483 between A541 and A5156, Wrexham (Grid ref SJ332525)
- A483 between A5156 and B5102, Wrexham (Grid ref SJ347553)
- A483 between B5102 and Wrexham boundary, Wrexham (Grid ref SJ365590)
- A483 between West Cheshire boundary and A55, West Cheshire (Grid ref SJ380614)
- A483 between A55(T) and Herons Way roundabout, West Cheshire (Grid ref SJ393630)
- A483 between Herons Way roundabout and A5104, West Cheshire (Grid ref SJ400641)
- A483 between A5104 and A5268, West Cheshire (Grid ref SJ402655)