In 2024, there were 1,441 road collisions on 20 and 30mph road speed limits (combined), the lowest figure since records began.
Yn 2024, roedd 1,441 o wrthdrawiadau ar ffyrdd lle roedd terfynau cyflymder o 20mya a 30mya (wedi'u cyfuno), sef y ffigur isaf ers i gofnodion ddechrau.