HGVs carried 36 million tonnes of road freight within Wales, 25 million tonnes to Wales from the rest of the UK and 22 million tonnes from Wales to the rest of the UK.
Cludodd cerbydau nwyddau trwm 36 miliwn o dunelli o nwyddau ar y ffyrdd yng Nghymru, 25 miliwn o dunelli i Gymru o weddill y DU, a 22 miliwn o dunelli o Gymru i weddill y DU.