Gall grŵp o chwech o weithwyr gostio mwy na £1,000 y noson i glirio sbwriel o ran 2km o gefnffordd ac ar ochr y ffordd, tra bod y gost o gau ffordd i wneud hynny yn costio dros £2,600 y noson.
A group of six workers can cost more than £1,000 a night to clear litter from a 2km stretch of trunk road and roadside, whilst the cost of a lane closure to do so is in excess of £2,600 a night.