The Welsh Government has said that all new road building projects will be put on hold while a review is carried out.
This means that plans for the 'Deeside Red Route', the Llandeilo Bypass, and the third crossing on Ynys Môn will all be halted.
Projects that are already underway—such as the 'Heads of the Valleys Road'—will not be halted.
The Welsh Government aims to reach net-zero carbon emissions by 2050— surface transport is the country's third largest source of emissions.
Friends of the Earth Cymru has previously called for a ban on new roads.
The Welsh Government also wants 45% of journeys to be made by public transport, walking, or cycling by 2040.