Am y rheswm hwn rwyf wedi comisiynu adolygiad annibynnol ynghylch y manteision a’r heriau sydd ynghlwm wrth wahanol ddulliau o reoli’r galw, gan gynnwys codi tâl ar ddefnyddwyr y ffyrdd.
For this reason, I have commissioned an independent review into the benefits and challenges of different demand management approaches such as road user charging.