Alongside publication of the national data, today the initial report by the independent Review Team, which is looking into the setting of exceptions to the default 20mph limit, has been published.
Ochr yn ochr â'r data cenedlaethol a gyhoeddwyd heddiw, cafodd adroddiad cychwynnol y Tîm Adolygu annibynnol, sy'n edrych ar esemptiadau i'r terfyn diofyn o 20mya, ei gyhoeddi hefyd.