O safbwynt pa mor wydn a diogel yw’r draffordd, mae rhwystr diogelwch concrid wedi’i osod ar ei hyd ynghyd â system ar gyfer rheoli terfynau cyflymder newidiol. Mae darparu ffordd fynediad y Gwaith dur, i’r de o Gasnewydd, hefyd wedi creu opsiwn mynediad ychwanegol. Mae dros £60 miliwn wedi’i wario ar y mesurau hyn er mwyn sicrhau bod y rhan hon o’r draffordd yn fwy gwydn a mwy diogel.
In terms of resilience and safety, a continuous concrete safety barrier and a variable speed limit management system has been introduced. Additional access capacity to the south of Newport through the delivery of the Steelworks access road has been provided.  These measures represent an investment of over £60M in safety and resilience of this section of Motorway alone.