Road access to the Cathedral is straightforward as follows:
- From City Centre - At Cardiff Castle, drive West and cross River Taff; turn right into Cathedral Road (A4119) and follow signs to Llandaff.
From M4 (East of Cardiff) - leave M4 at Junction 29 on A48(M), then after 3 miles the A48 (Eastern Avenue). Remain on A48 and, after passing Gabalfa Interchange, the Cathedral will be visible ahead. After 1 mile take left exit and follow signs for A4119 and Llandaff Cathedral.
- From M4 (West of Cardiff) - leave M4 at Junction 32 on A470 South. Remain on A470 until Gabalfa Interchange. Turn right on to A48 (Western Avenue) and after 1 mile take left exit and follow signs for A4119 and Llandaff Cathedral.