Ar ben hyn, mae'r Comisiwn yn ystyried sut y gallai wella'r rhwydwaith trafnidiaeth ar draws y De-ddwyrain. Bydd ffocws lawer ehangach i argymhellion y dyfodol na'r argymhellion 'cyflym' cychwynnol hyn, a byddant yn ymdrin hefyd â dulliau teithio eraill.
Beyond this, the Commission is considering solutions to improve the transport network across South East Wales. The focus of future recommendations will be much broader than the initial ‘fast-track’ recommendations relating to the M4, and will include alternative transport modes.