Travelling to the match on Saturday, I found the new dedicated lane which bypasses the roundabout (where the Radyr road (Heol Isaf) joins the Llantrissant road (A 4119) travelling south) difficult to negotiate. Before joining the A 4119, checking the traffic flow is not straightforward and probably the safest thing to do is stop and then look (I did see the broken double white lines!). Approaching this for the first time, I expected two lanes with traffic coming from my right to have its own lane.

Btw, I agree with your Tongwynlais comment, though I've never seen an accident there and locals who use the road will surely be aware of the layout.

(@Delmbox - the poster isn't twenty-one.
Are you?
You certainly don't look it )