The Welsh authorities said it would instantly recommence improvement enactment for a 3rd Menai crossing.
Plans had been formally scrapped 3 years ago, though a twelvemonth aboriginal the past Labour Transport Secretary Ken Skates suggested it was backmost connected the agenda.
Officials judge a caller crossing could outgo astir £670m, with improvement enactment taking up to 2 years. It would beryllium astatine slightest 8 to 10 years earlier the crossing was built.
The A55 is presently carried implicit the Menai by the Britannia Bridge, and dissimilar the remainder of the roadworthy it is simply a azygous carriageway.
The Menai Suspension Bridge has been restricted to vehicles nether 7.5 tonnes since repair works began successful October 2022.
The authorities has ruled retired a three-lane tidal-flow cognition connected the Britannia Bridge aft a reappraisal recovered important information and operational concerns.
Hooper said the authorities would put successful upwind deflectors, adaptable velocity limits and different improvements connected the bridge.
But helium said: "These measures volition not regenerate the request for a 3rd crossing."
The authorities promised to accelerate existing plans for caller stations astatine Magor, Undy and Cardiff Parkway.
Rail is not devolved, though the UK authorities has already pledged £445m for caller obstruction stations.
Hooper told the Senedd that a caller Network South East Wales committee would oversee delivery.
"I person asked the squad to prioritise transportation of the Cardiff Parkway and Magor and Undy stations truthful communities tin statesman to payment from these investments arsenic rapidly arsenic possible."
Hooper said "people privation action, not endless discussion".
"They privation reliable journeys, little disruption and assurance that authorities is getting connected with improving things and making a quality to people's lives. And that's precisely what we're doing.
"We volition transportation retired an 18-month survey to see a scope of road-based solutions for the M4 astir Newport. Alongside that work, we are taking enactment to trim peak-hour postulation by up to astir 1 successful 10 vehicles."
Labour's Newport assembly leader, Batrouni, said the projected junction closures were a "bitter pill" for residents impacted.
"We volition wholly beryllium doing we tin to situation the Welsh authorities and Plaid's determination connected this.
"It adds a large postulation load to the city," helium added.
Leader of Reform Wales, Helen Jenner, said: "Plaid's reply to the M4 congestion occupation appears to beryllium moving the postulation astir and closing junctions alternatively than solving the problem."
She added: "Reform believes the M4 alleviation roadworthy remains the lone credible mode to supply further capableness and instrumentality unit disconnected the existing motorway."
Welsh Labour spokesperson for transport, Vikki Howells, said: "It's taken the Plaid authorities 5 months to realise there's a postulation occupation successful Newport - and present it's taking them different 18 months to travel up with immoderate answers."
She said each Plaid seemed susceptible of "is yet different review".
"Ministers should present devolve this determination retired to section leaders, truthful radical successful Newport aren't made to hold adjacent longer for action."
Natasha Asghar, of the Welsh Conservatives, said: "Closing important and well-used motorway junctions volition simply determination congestion astir and clog up A roads and different metropolis streets alternatively than creating further roadworthy capacity."
She welcomed the wider bundle of measures, including progressing caller bid stations, but added: "None of these are a substitute for a semipermanent solution to the cardinal capableness problems connected the M4 astir Newport, which tin lone beryllium addressed by expanding capacity. The champion mode to bash this is to physique an M4 alleviation road."
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