The roads set to be reduced to 20mph include part of the A479 at Talgarth, a section of the A487 at Aberaeron – where a part-time 20mph limit already operates – and a stretch of the A487 at Corris Uchaf.

Confirming the move, the Welsh Government explained that the proposed changes would impact some 20mph or 30mph speed limits on the trunk road network.

At Talgarth, officials revealed they are also looking at whether a new pedestrian crossing should be installed alongside the lower speed limit.

Meanwhile, at Corris Uchaf, a “buffer” speed limit is planned for the southern approach into the new 20mph zone, allowing drivers to slow down more gradually.

The review covered roads managed directly by the Welsh Government, as well as those overseen by the North and Mid Wales Trunk Road Agent and the South Wales Trunk Road Agent.

The latest proposals follow Wales‘s controversial decision in September 2023 to cut the default speed limit in built-up areas from 30mph to 20mph.

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The policy sparked fierce backlash from drivers, with critics arguing it was unnecessary and expensive. The £34million scheme led to widespread protests and political pressure.

However, campaigners have claimed the change improved safety. Supporters said the policy resulted in “nearly 900 fewer injuries” on Welsh roads.

In response to the public anger, ministers confirmed in 2024 that some roads would be allowed to return to 30mph where appropriate.

Now, after completing a nationwide assessment of trunk roads, the Welsh Government has published a list of locations where further changes are being considered. While some routes will see limits cut to 20mph, others are set to go back up to 30mph.

These include sections of the A40 at Glangrwyney, the A4076 at Johnston, the A483 at Llandybie and parts of the A487 at Aberystwyth, Southgate and Trefechan.

The Government is also exploring introducing a wider use of so-called “buffer” zones. These are short transitional speed limits designed to help motorists slow down more safely when entering lower speed areas.

Explaining how this would work, ministers said: “For example, if a driver is travelling at 60mph and is about to enter a 20mph speed limit, we may add a short 40mph section in between.”

Such buffer zones could be added even if the main speed limit on a road does not change. In Bala, where part of the A494 is due to increase to 30mph, a buffer zone will be introduced on the northern approach to the remaining 20mph stretch.

Similar transitional limits have been proposed at Crickhowell, Llangurig and Llanfair Caereinion. In addition, pedestrian crossings and clearer signage are being considered on 25 other roads where speed limits will stay the same.

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Locations under review include Cartlett, Goodwick, Merlins Bridge and Milford Haven, where officials are assessing whether new crossings are needed. Buffer zones are also planned for approaches to existing 20mph areas at Commins Coch, Erwood, Llan Ffestiniog and Llanrwst along the A470.

On the A5 at Bethesda, the introduction of a pedestrian crossing is being examined. At Erwood, officials are also considering whether a pavement should be added alongside the buffer zone.

Further transitional speed limits are set for Ruthin and Llanbedr Dyffryn Clwyd on the A494, as well as Froncysyllte and Pont Cyfyng near Capel Curig on the A5.

Any changes will require new Traffic Regulation Orders, a legal process that typically takes around nine months to complete.

But the Government did note that roundabouts and junctions linking to local authority roads will not see speed limit changes under the current plans. However, signage will be reviewed at the A470 Swansea Road roundabout, the A40 Robeston Wathen roundabout and the A48 Cross Hands roundabout.

Ministers said engineering measures such as crossings and pavements are also being considered to improve safety for those walking, wheeling or cycling, with each location assessed individually.