Figure 4: Quarterly casualties reported on roads with a 20 or 30mph speed limit in Wales, 2010 Q1 to 2024 Q2
Ffigur 5: Marwolaethau ac anafiadau wedi'u cofnodi bob chwarter ar ffyrdd â therfyn cyflymder o 20mya neu 30mya yng Nghymru, Ch1 2010 hyd at Ch4 2024