Yng nghyd-destun diogelu iechyd y cyhoedd, mae Cyngor Caerdydd wedi penderfynu ailystyried ei gynllun ar gyfer Heol y Castell er mwyn sicrhau mai hwn yw’r dull cywir o hyd, a’i fod yn ddigon uchelgeisiol. Ym mis Mehefin y llynedd, penderfynodd y cyngor osod y cynllun a gymeradwywyd ar gyfer Heol y Castell ar sail dros dro, a gwneud rhagor o waith dadansoddi a modelu ar yr elfennau o’r cynllun sy’n ymwneud ag aer glân, tagfeydd, ac adfer ac adnewyddu’r ddinas.
In the context of protecting public health, Cardiff Council have taken the decision to reconsider their Castle Street scheme to ensure it is still the right approach and is sufficiently ambitious. In June last year the Council resolved to install the approved Castle Street scheme on an interim (temporary) basis and undertake further modelling and analysis of the scheme on clean air, congestion, and city recovery and renewal.