Further information about the aims and objectives of both pilot studies can be found in the WNTS Stage 1b: Qualitative and Quantitative testing report (TfW).
Mae rhagor o wybodaeth am nodau ac amcanion y ddwy astudiaeth beilot ar gael yn yr adroddiad WNTS Stage 1b: Qualitative and Quantitative testing report (Trafnidiaeth Cymru).