As context, there are permanent 50 mph speed limits on other sections of the A55 which do not comply with rural road design standards (e.g. through Colwyn Bay).
I roi cyd-destun, mae terfynau cyflymder parhaol o 50mya ar rannau eraill o'r A55 nad ydynt yn cydymffurfio â safonau dylunio ffyrdd gwledig (e.e.