A34 closed between near Newbury due to an overturned vehicle
Update: This has now cleared.
The A34 is shut northbound between the A303 Bullington Interchange in Hampshire and the B4640 Tot Hill Interchange near Newbury.
Both lanes have closed after a collision involving two cars, one of which has overturned.
Hampshire Police are attending the scene and managing the emergency service response.
Traffic is being diverted via local routes.
The event is expected to clear between 4.45pm and 5pm today (Wednesday).
Normal traffic conditions are expected between 5.45pm and 6pm this evening.
National Highways said: "If this closure impacts on your planned route, please allow extra journey time.
"Plan ahead, you may wish to re-route or even delay your journey.
"Further information is available from National Highways by visiting our www.trafficengland.com website and travel apps, or via our regional twitter feed. Our 24/7 contact centre team is also available to provide up-to-the-minute information on 0300 123 5000."