That’s more than 1,000 lives lost or seriously affected by collisions every year, with huge impacts on their families and friends.
Golyga hyn fod dros 1,000 o unigolion un ai’n cael eu lladd neu eu heffeithio'n ddifrifol gan wrthdrawiadau bob blwyddyn, gydag effeithiau enfawr ar eu teuluoedd a'u ffrindiau.