Hi Editors,

Travelling north from Coytrahen on the A4063, as far as Llangynwyd, the speed limits were changed in 2021. Street view shows the old speed limit signs whited out, and the new limits marked with temporary signs. Those new limits have long since been made permanent.
Basically, where once was 60 has become 50, and the stretch of road passed the papermill is now 30, returning to 50 instead of 60 before arriving at Llangynwyd. (The mill was under construction when street view was taken.)

I don't travel the road often, but, can answer any questions in due course..