M3 road closures 2026 cause disruption across Surrey and Hampshire, affecting key motorway routes between London, Basingstoke, and Southampton.
The M3 road closures in England are causing disruption across key routes connecting Surrey and Hampshire on April 15, 2026. The motorway, which links Sunbury-on-Thames, Basingstoke, Winchester, and Southampton, is experiencing delays due to closures and roadworks. Drivers are being warned to expect slow traffic and possible diversions as authorities manage congestion on one of the South of England’s busiest transport corridors.
M3 Road Closures Disrupt Major South England Route
The M3 motorway is one of the most important routes in southern England. It connects London commuter areas with key cities like Southampton and Winchester.
On April 15, 2026, motorists reported delays linked to ongoing M3 road closures and maintenance work.
The disruption is affecting both commuter and freight traffic.
What We Know So Far
- M3 road closures reported on April 15, 2026
- Disruption affecting Surrey and Hampshire sections
- Delays reported near major junctions and commuter zones
- Traffic impacted between Basingstoke, Winchester, and Southampton
- Roadworks and congestion contributing to slow movement
- No full motorway shutdown confirmed
Drivers are being advised to plan ahead and expect delays during peak hours.
About the M3 Motorway
The M3 runs approximately 59 miles from Sunbury-on-Thames in Surrey to Eastleigh in Hampshire.
It serves major towns including:
- Basingstoke
- Winchester
- Southampton
Originally known as the London to Basingstoke Motorway, it has been in operation since 1971.
The motorway remains a key commuter and logistics route in southern England.