UPDATE 4.22pm: Traffic remains slow on the A472, both ways from Crown roundabout, Pontllanfraith, to the Ystrad Mynach roundabout.
A CRASH has partially blocked the main A472 both ways at the Crown roundabout in Pontllanfraith.
Traffic is queuing both ways as a result, back to the Ystrad Mynach roundabout for eastbound vehicles, and to the Gelligroes roundabout for westbound vehicles.
The incident is affecting bus services, including Stagecoach service number 26.
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