The restrictions generally resulted in reduced traffic volume for all types of motorised vehicles which is likely to have impacted the statistics presented in this release.
Yn gyffredinol, arweiniodd y cyfyngiadau at lai o draffig ar gyfer pob math o gerbydau modur sy'n debygol o fod wedi effeithio ar yr ystadegau a gyflwynir yn y datganiad hwn.