A vehicle has collided with a pedestrian following what has been described as a "serious crash". Avon and Somerset Police said the A4174 Ring Road has been shut in both directions following the incident.
The crash has led to emergency services setting up a road closure in both directions between the Deanery Road roundabout and Wraxall Road in Kingswood. Drivers looking to use the road have been urged to seek alternative routes.
Motorists caught up in the jams have told BristolLive that the traffic is "madness". Road monitoring website Inrix said congestion is building between Grimsbury Road and Tower Road as motorists are diverted away from the scene.
Read more: Live: Ring road closed due to crash
A statement from Avon and Somerset Police said: "Emergency services are at the scene of a serious road traffic collision on the A4174 Ring Road, Bristol, this morning (Thursday, May 25). We can confirm it was a collision involving a pedestrian and a vehicle.
"Closures are in place from Deanery Road Roundabout to Kingswood and at the through-about from Wraxall Road to Kingswood. Motorists are advised to seek alternative routes."
Public transport services are also being affected by the closure. First West of England said its number 19 bus service is being delayed, tweeting: "Due to the A4174 Ring Road closure, services are currently experiencing severe delays.
"Services are attempting to divert and run complete routes as soon as possible. We apologise for any inconvenience caused."
Follow updates from the incident in our live blog here.
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