Temporary 40mph Speed Limit Introduced on Sections of M4 Motorway
New legislation has been published today, 14th July 2025, introducing a temporary 40 miles per hour speed limit on specific stretches of the M4 motorway in South Wales.
The M4 Motorway Junction 23A (Magor, Monmouthshire) to Junction 26 (Malpas, Newport) and Junction 30 (Cardiff Gate, Pontprennau) to Junction 33 (Cardiff West) (Temporary 40 mph Speed Limit) Order 2025, published by the UK government, designates these temporary restrictions.
While the exact reasons for the implementation of this speed limit have not been detailed in the initial announcement, such measures are typically introduced to ensure public safety during roadworks, maintenance operations, or in response to specific traffic or environmental conditions. The specified sections of the M4 are significant routes for commuters and freight transport, and any changes to speed limits are likely to affect journey times.
Drivers using these sections of the M4 are advised to be aware of the new regulations and to adhere to the posted speed limits. The duration of the temporary speed limit will be dependent on the circumstances necessitating its introduction. Further information regarding the specific reasons and expected duration of the 40 mph limit may become available through official channels as the situation develops.
Motorists are encouraged to plan their journeys accordingly and to exercise caution when travelling through these areas. Regular checks of traffic updates and official announcements from relevant authorities are recommended to stay informed about any further changes or advisories.
AI has delivered the news.
The answer to the following question is obtained from Google Gemini.
UK New Legislation published ‘The M4 Motorway Junction 23A (Magor, Monmouthshire) to Junction 26 (Malpas, Newport) and Junction 30 (Cardiff Gate, Pontprennau) to Junction 33 (Cardiff West) (Temporary 40 mph Speed Limit) Order 2025 / Gorchymyn Traffordd yr M4 Cyffordd 23A (Magwyr, Sir Fynwy) i Gyffordd 26 (Malpas, Casnewydd) a Chyffordd 30 (Porth Caerdydd, Pontprennau) i Gyffordd 33 (Gorllewin Caerdydd) (Terfyn Cyflymder 40 mya Dros Dro) 2025‘ at 2025-07-14 02:03. Please write a detailed article about this news in a polite tone with relevant information. Please reply in English with the article only.