Llwybr Newydd is also supported by a more detailed 'Mobility in Wales' report, the 'Transport Data and Trends' report and an 'Integrated Sustainability Appraisal'.
Ategir Llwybr Newydd hefyd gan adroddiad manylach ar Symudedd yng Nghymru, yr adroddiad Data a Thueddiadau Trafnidiaeth ac Arfarniad Cynaliadwyedd Integredig.