The M3 westbound in Hampshire is blocked between junction 12 (Eastleigh) and junction 13 (Southampton) following a serious collision, leading to significant traffic disruption. Motorists are facing delays of up to 40 minutes, with queues stretching for approximately 4 miles on the approach to the incident.
National Highways Update
National Highways confirmed the blockage in a statement: "The #M3 in #Hampshire is blocked westbound between J12 #Eastleigh & J13 #Southampton due to a collision. Emergency services are working on scene. Current delays of 40 minutes with 4 miles of congestion on approach." The agency advises drivers to allow extra travel time or seek alternative routes where possible.
Emergency Services at Scene
Emergency services, including police and paramedics, are at the scene. The extent of injuries is not yet known. Traffic officers are assisting with diversions and managing the flow of vehicles. The westbound carriageway is expected to remain closed for some time as investigations and recovery operations take place.
Impact on Travel
The collision has caused heavy congestion on the M3 and surrounding roads. Drivers heading towards Southampton are advised to use the A334 or A27 as diversions. Delays are likely to persist into the afternoon. National Highways will provide further updates as the situation develops.



