While the long-list of options considered was therefore extensive (with 22 options in all), it was largely focussed on options that have the effect of increasing capacity on the road network.
Felly, er bod y rhestr hir o opsiynau a ystyriwyd yn un helaeth (22 o opsiynau i gyd), roedd yn canolbwyntio'n bennaf ar opsiynau sy'n cynyddu capasiti'r rhwydwaith ffyrdd.