Quote Originally Posted by North Cardiff Blue View Post
Totally agree, side streets some idiots do go too fast, even when cars are double parked so 20 is right, but Caerphilly road, Pantmawr road, and Rhiwbina hill 20mph are ridiculous.
I wish there was some consistency with it all.

I just did a speed awareness course after being done in a 20 zone going all the way through Cilfynydd. The guy hosting it suggested that most 20mph zones are put in place if lots of residents complain about the speed of traffic or if there have been several incidents on that particular road.

Take the A4054 going north of Ponty. 20mph until the end of Cilfynydd. There's another one just north of Treharris with average speed cameras, so I can only presume that short stretch has been a bit of a blackspot. I live just off a far busier road near Aberdare and that's a 30mph limit, while I'm slightly surprised by a 40mph limit on the way to Ynysybwl where there are houses and several junctions.

In any case, road safety should be more of a priority than trying to get somewhere as quickly as possible.