M4 Junction 32/A470 Dedicated Lane The M4 and the A470 are both busy trunk roads in Wales and form part of the strategic transport network supporting many communities within the area. The two roads meet at Junction 32 of the M4 at Coryton. Congestion during peak flows had been a problem at this junction for many years and it was identified as both a safety risk and a common cause for both public and business disruption. The improved highway arrangement now provides a dedicated lane for traffic from the M4 to the A470. The two lanes of traffic from the Coryton gyratory now merge into a single lane on the A470 slip road. The new layout allows traffic to flow freely on to the A470 and maximises the road capacity of the Coryt

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