Ymchwil a datblygu ar gyfer Arolwg Teithio Cenedlaethol Cymru Mae'r dogfennau ar y dudalen hon yn rhoi manylion ynglŷn ag ymchwil a datblygiadau methodolegol a wnaed ar gyfer Arolwg Teithio Cenedlaethol Cymru. Wales National Travel Survey: Review Report Wales National Travel Survey: Survey Evaluation Report Wales National Travel Survey: Diary Evaluation Wales National Travel Survey: Questionnaire Assessment Wales National Travel Survey: Sampling approaches Wales National Travel Survey: Additional Sampling note WNTS Stage 1b: Qualitative and Quantitative testing Wales National Travel Survey - Pretesting Synthesis Report
