National Highways has now moved into the construction phase of the Medium‑Term Solution for the M48 Severn Bridge, with on‑site activity continuing throughout September and October.

What’s Happening Now

Construction began on 2 September 2026, with works focused on the Junction 1 westbound on‑slip road and nearby mainline areas. Current activity includes:

• Installing new ducting and cabling routes from the A403 Aust roundabout to the M48 on‑slip .
• Surface preparation works on the Welsh side within the closed section .
• Building foundations for new CCTV structures on the English westbound on‑slip.
• Installation and connection of new roadside cabinets, paving and apron works.

Technology Testing

At the National Highways test facility in Moreton‑in‑Marsh, the new ANPR camera, traffic signal and Weigh‑In‑Motion system are undergoing Factory Acceptance Testing.

This testing “helps to refine the systems algorithm… prior to installation rather than being developed on site.”

Traffic & Safety

National Highways continues to monitor weight limits on the bridge and is progressing the Traffic Regulation Orders needed for future enforcement. Work is also underway with Avon & Somerset Police and Gwent Police to coordinate the enforcement approach.

Next Milestone

The bridge remains scheduled to reopen to HGVs under controlled conditions by end of January 2027.