The road measures 120.34 miles long and would take a car obeying speed limits 3 hours and 17 minutes to travel its length.
The A48 is a A Road and is located in the Zone 4 Highways Region.
This is a true long-distance route, journeying through numerous towns like Pensarn, CARMARTHEN, Cwmffrwd, Nantycaws, Capel Dewi, Llanddarog, Porthyrhyd, Foelgastell, Cefneithin, Gorslas, Cross Hands, Cwmgwili, Pontarddulais, Pontlliw, Penllergaer, Llangyfelach, Morriston, Clase, Swansea Enterprise Park, Llansamlet, Peniel Green, Birchgrove, Briton Ferry, Jersey Marine, NEATH, Baglan, PORT TALBOT, Margam, Pyle, Stormy Down, Laleston, BRIDGEND, Merthyr Mawr, Waterton, Bridgend Industrial Estate, Brocastle, Colwinston, Pentre Meyrick, COWBRIDGE, Aberthin, St. Hilary, Bonvilston, St. Nicholas, CARDIFF, Penylan, Llanedeyrn, Pentwyn, Llanrumney, Pontprennau, Old St. Mellons, St. Mellons, Castleton, Coedkernew, NEWPORT, St. Brides Wentlooge, Langstone, Llandevaud, Penhow, Llanvaches, St. Brides Netherwent, Caerwent, Crick, Hayesgate, Mathern, Pwllmeyric, CHEPSTOW, Tutshill, Tidenham, Stroat, Woolaston, Alvington, Aylburton, LYDNEY, BLAKENEY, NEWNHAM, Bullo Pill, Ruddle, Broadoak, Elton, WESTBURY-ON-SEVERN, Wintles Hill, Chaxhill, Minsterworth, Elmore, and Highnam.
This is a true long-distance route that passes through multiple counties, including Dyfed, West Glamorgan, Mid Glamorgan, South Glamorgan, Gwent, and Gloucestershire.