Cafodd y comisiwn ei sefydlu gan Weinidogion Cymru y llynedd i ystyried ffyrdd o fynd i'r afael â thagfeydd ar yr M4 a'r ffyrdd o'i hamgylch. Gofynnwyd i'r comisiwn edrych ar opsiynau eraill i'r ffordd liniaru. Byddwn yn cynnig pecyn o argymhellion cyffredinol sy'n cynnwys y ffyrdd, bysiau, trenau a theithio llesol.
The commission was established by Welsh Ministers last year to consider ways to tackle congestion on the M4 and surrounding roads. The commission has been asked to look at alternatives to the relief road. It will put forward a broad package of recommendations that include road, bus, rail and active travel.