A wnaiff y Gweinidog amlinellu sut y cyrhaeddodd Llywodraeth Cymru yr amcangyfrif o £92 miliwn o arbedion ar gyfer GIG Cymru o ganlyniad i gyflwyno'r polisi cyffredinol o 20mya?
Wedi'i ateb gan Y Dirprwy Weinidog Newid Hinsawdd | Wedi'i ateb ar 06/10/2023
The reduction of the default speed limit to 20mph on restricted roads is not a blanket policy.
The estimated saving of £92 million was made by Edinburgh Napier University Transport Research Institute. Technical Paper 101