Motorway fork sign
A blue sign with a diagram showing a branch off the road ahead and the following text.
Forward destinations: Llanelli; Caerfyrddin; Carmarthen; Abertawe (Gn); Swansea (W).
Exit destinations: Llangyfelach; B4489; Felindre; [Hospital (with A&E) symbol].
Junction number: 46.
We've just travelled the Morriston and Llangyfelach Bypass, opened in 1972 and one of the earliest bits of the Welsh M4. Beyond this junction, the rest of the motorway opened in a single jump in 1977 - a year in which seemingly most of the Welsh M4 was built.