I will find solution to M4 congestion, first minister says
The Plaid Cymru leader said the Brynglas Tunnels in Newport are an "economic problem for Wales" and that he will find a solution to tackle the traffic black spot.
But ap Iorwerth did not commit to a specific scheme in an interview with BBC Walescast.
Plaid had been opposed to the proposed M4 relief road when the former Labour government last ditched the scheme.
The M4 relief road, also known as the black route, was a controversial project to build a new motorway across the Gwent levels south of Newport.
It would have bypassed the Brynglas Tunnels, which struggle to cope with the volume of traffic the M4 attracts at peak times.

IWA/CILT
"We remain against that black route as it was called, which was unnecessary," he said, adding that a "road-based solution" was still needed alongside new railway stations proposed between Cardiff and the Severn Tunnel.
Ap Iorwerth said options could include a proposal to strengthen the road network using the old A40, and the so-called blue route which would involve upgrading an existing dual carriageway through the south of Newport.
"What we need to do is do the work, and we will, to find the solutions," he said.
Former first minister Carwyn Jones was the last Welsh Labour leader to support the project, before it was ditched by his successor Mark Drakeford citing environmental grounds and costs.
After Reform and the Conservatives vowed to build the M4 relief road in the Senedd election campaign, Drakeford told BBC Wales he believed it would be financially "prohibitive" to revive the scheme, which when axed was thought to cost £1.6bn.

Lewis Clarke
"Something has to be done to improve the resilience of that Britannia crossing," he said, referring to the bridge which carries the A55.
"One answer is to have another structure next to it. Another one which I pushed for years is to have a sort-of three lane model."
In the wide-ranging interview, the first minister recommitted himself to his election campaign promise of ending two-year waits in the NHS within a year, after his health minister told ITV Wales it could take up to four.
Asked about the comment, ap Iorwerth said he stuck to his original target and denied the pair were saying different things.
But he said he will be "honest" if there are "blocks in the road" that stop the government moving as quickly as it wanted.


Ap Iorwerth said: "We should be concerned about giving people the support to be in a place that they don't need that safety net.
"But there are people who will always need that safety net and it's only right that we look after them."
Watch Walescast on iPlayer and listen on BBC Sounds.
Support Everyday Chronicle
Global reporting requires independent voices. If you value our coverage, please consider a small contribution to help us grow.
​Click the button below to make a secure donation
Discover more from Everyday Chronicle
Subscribe to get the latest posts sent to your email.
Have any thoughts?
Share your reaction or leave a quick response — we’d love to hear what you think!