Those in favour tended to see many positives associated with 20mph speed limits and, as a result, endorsement was high for almost all the reasons.
Roedd y rhai oedd o blaid yn tueddu i weld nifer o agweddau cadarnhaol ynghlwm â therfynau cyflymder o 20mya ac, o ganlyniad, roedd llawer o gefnogaeth i bron bob un o’r rhesymau.