Lever's Hill in both directions is blocked due to an overturned vehicle between Frocester Hill and Peak Lane.
Police are on the scene awaiting recovery.
More top news
A British paleontologist has discovered a new species of dinosaur while studying fossils in a Canadian museum.
A report into the care of people with learning disabilities has called for "immediate action" to protect patients.
A 42-year-old man who staged a bomb hoax resulting in hundreds of homes being evacuated in Fishponds has been jailed for 20 months.