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The A470 Trunk road, Powys/Merthyr Tydfil boundary - Temporary speed restrictions due to works
What is happening?
GORCHYMYN CEFNFFORDD YR A470 (FFIN SIROL POWYS/MERTHYR
TUDFUL I LANFAIR-YM-MUALLT, POWYS) (CYFYNGIADAU
CYFLYMDER A DIM GODDIWEDDYD DROS DRO) 202-
MAE GWEINIDOGION CYMRU yn bwriadu gwneud Gorchymyn o dan adran 14 o Ddeddf Rheoleiddio Traffig Ffyrdd 1984 ymhen dim llai na 7 niwrnod i ddyddiad yr Hysbysiad hwn. Mae angen y Gorchymyn er mwyn gwneud gwaith ar gefnffordd yr A470, neu gerllaw iddi, rhwng ffin sirol Powys/Merthyr Tudful a Llanfair-ym-Muallt, Powys.
Effaith y Gorchymyn arfaethedig fydd gosod terfyn cyflymder dros dro o 40 mya, 30 mya neu 10 mya ar y darn o gefnffordd yr A470 rhwng ffin sirol Powys/Merthyr Tudful ym Mhont Llysiog hyd at ei chyffordd gylchfan â’r A483 yn Llanfair-ym-Muallt. Dim ond yn ystod gwaith confoi y bydd y terfyn cyflymder o 10 mya yn weithredol a ni chaniateir goddiweddyd ar yr adegau hynny.
Daw’r Gorchymyn i rym ar 18 Gorffennaf 2026. Disgwylir y bydd y cyfyngiadau a’r gwaharddiad dros dro, y bydd eu hyd a’u lled yn amrywio, yn weithredol yn ysbeidiol o 08:00 o’r gloch ar y dyddiad hwnnw am gyfnod hwyaf o 18 mis. Bydd hysbysiad am y gwaith yn cael ei arddangos cyn i unrhyw waith ddechrau.
C WYNN, Trafnidiaeth, Llywodraeth Cymru
THE A470 TRUNK ROAD (POWYS/MERTHYR TYDFIL COUNTY
BOUNDARY TO BUILTH WELLS, POWYS) (TEMPORARY SPEED
RESTRICTIONS AND NO OVERTAKING) ORDER 202-
THE WELSH MINISTERS propose, in not less than 7 days from the date of this Notice, to make an Order under section 14 of the Road Traffic Regulation Act 1984, which is necessary to undertake works on or near the A470 trunk road between the Powys/ Merthyr Tydfil county boundary and Builth Wells, Powys.
The effect of the proposed Order will be to impose a temporary 40 mph, 30 mph or 10 mph speed limit on the length of the A470 trunk road between the Powys/Merthyr Tydfil county boundary at Pont Llysiog to its roundabout junction with the A483 at Builth Wells. The 10 mph speed limit will only apply during convoy working and no overtaking will be permitted during these times.
The Order will come into force on 18 July 2026. The temporary restrictions and prohibition, whose extent will vary, are expected to operate intermittently from 08:00 hours on that date for a maximum duration of 18 months. Notice of the works will be displayed before they start.
C WYNN, Transport, Welsh Government
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