Has 20mph made our roads safer?

[Eric the Half a Bee]

I was driving through Tylorstown to Maerdy a few weeks ago, it was 20mph with cameras. If it has since changed then fair enough, but I imagine that has an impact on people. I remember working in Dinas Rhondda last year and before the speed change there was little traffic coming towards Pontypridd, the same week the changes happened they were backing up past the heritage hotel. That is an impact in my eyes, luckily like Eric mentions they've seen sense and changed it to 30 through Hopkinstown, but if its still 20 further up then I imagine its still having an impact on people at peak times.

That road between Porth and Ponty can get very busy at peak times and can be very quiet at times as well.

The question has to be that, if there are roads where reverting back to 30mph has been done as traffic flow is more important that road safety, then how can anyone argue that road safety is the biggest priority, as in some places, this obviously cannot be the case.