All new road construction projects in Wales have been suspended while the Welsh government undertakes a review.
Means plans for the Deeside "red route", the Llandeilo bypass and the สล็อต third Anglesey crossing will be suspended.
The minister said this was a key part of Wales' efforts to reduce carbon emissions.
But the Conservatives warned that the decision was "Major explosion" for economic recovery
Plaid Cymru, meanwhile, said the review did not mean the community was "neglected".
Deputy Minister for Climate Change Lee Waters announced the hearings in the Welsh Parliament on Tuesday afternoon.
Existing projects such as Heads of the Valleys will continue.
part of the plan The Welsh government wants to shift money from new roads to preserve existing ones and invest in public transport.
Wells aims to reach zero carbon by 2050.
But to get to that point Mr Waters said Wells needed to increase its emissions cuts over the next decade to double the number of cuts over the past 30 years.
He told BBC Wales: "Transport makes up about 17% of our total emissions. So it must be involved.