"The M48 Severn Bridge is very heavily used and is now in need of significant resurfacing, which is vital to keep drivers safe and the route running into the future. To set up the contraflow, there will be overnight closures, lane closures and some 24-hour weekend closures. The resurfacing trial is part of the Government’s £27 billion Road Investment Strategy, which includes £8.4 billion for resurfacing carriageways and renewing bridges between 2026 and 2031. The original bridge surface, laid by hand in the 1960s, was a 35mm mastic asphalt layer designed to keep the structure’s weight within safe limits. The improvements aim to boost the resilience of the M48 Severn Bridge, reduce the risk of unplanned closures, and help future-proof the route.