Yn gynharach eleni, comisiynwyd y Sefydliad Polisi Cyhoeddus gennyf i ystyried sut y dylid cryfhau y dull o gynllunio trafnidiaeth yng Nghymru.  Cyhoeddwyd yr adroddiad 'Dulliau Strategol o Gynllunio Trafnidiaeth' ym mis Tachwedd, a gwnaeth yr achos dros fuddsoddi mewn modelau galw ar drafnidiaeth i lywio'r broses o gynllunio trafnidiaeth a phenderfyniadau buddsoddi.
Earlier this year, I commissioned the Public Policy Institute to consider how transport planning could be strengthened in Wales.  Professor John Preston’s report 'Approaches to Strategic Transport Planning' was published in November and made the case for investment in transport demand models to inform transport planning and investment decisions.