The M4 eastbound link road is closed between J20, and the M5 J15 in South Gloucestershire due to a serious collision.
The lanes at the Almondsbury Interchange lanes are blocked.
Traffic is queueing for about three miles due to accident, that involved two cars involved..
Cameras show the cars have collided just as the slip road splits from the main carriageway.
Road users wanting to join the M5 from the east are advised to continue on the M4 eastbound to J19/M32. At the junction turn back onto the M4 westbound to join the M5 at J15 to travel north or south.
Highways England tweeted: “Delays are likely on the approach to the closure, with additional journey times also expected on diversion routes. Please allow extra time for your journey if travelling in the area or consider alternative routes. ”
More updates to follow.