A new weight restriction has been introduced on the M48 Severn Bridge, limiting access for heavy goods vehicles (HGVs) over 7.5 tonnes. The measure, announced by National Highways, aims to protect the 60-year-old structure that links England and Wales by reducing strain on its cables.
Approximately 10% of the 32,000 vehicles that cross the bridge daily at Chepstow will now need to divert via the M4 Prince of Wales Bridge, creating potential delays and logistical challenges for freight operators.
Restriction in Place for 12 to 18 Months
The weight limits, which came into effect this week, are expected to last for 12 to 18 months while a medium-term structural solution is developed and implemented. Despite the restriction, the crossing remains open to emergency vehicles, scheduled buses, coaches, gritters, and recovery trucks.
National Highways said the decision was made “in the interest of public safety” and is part of a broader review to ensure the longevity of the bridge, which first opened in 1966.
Concerns from Hauliers Over Business Impact
Some haulage firms have warned the new route will create significant disruptions. A director of a major haulage company in Avonmouth said the M4 diversion isn’t always reliable and that drivers might be forced to detour around Gloucester, adding hours to their journeys and increasing costs.
Hauliers fear that increased fuel expenses, traffic congestion, and delays could have a “devastating” impact on delivery schedules and operational viability.
Enforcement Measures Under Review
To ensure compliance, Automatic Number Plate Recognition (ANPR) cameras may be deployed to monitor overweight vehicles attempting to use the restricted route. During unplanned closures of the M4 bridge, affected vehicles will be rerouted via the M5 and M50 corridors.
National Highways officials acknowledged the disruption but said they had “no choice” due to growing concerns over the ageing infrastructure. Work is ongoing to identify a long-term engineering solution that could eventually allow HGVs to return in a safe and controlled manner.
