In the short-term, data from the Labour Force Survey on usual mode of travel to work and data from the National Survey for Wales on mode of travel to school can be considered.
Yn y tymor byr, mae modd ystyried data o'r Arolwg o'r Llafurlu ar y dull arferol o deithio i'r gwaith a data o Arolwg Cenedlaethol Cymru ar y dull o deithio i'r ysgol.