Emergency services are on scene following a crash between a motorcyclist and car at Galleys Corner roundabout.
The collision appears to have taken place opposite the exit to Long Green road.
Queues are said to be back to Marks Farm on the A120.
A police spokesman said no one was thought to have been seriously injured, but one person had complained of shoulder pain.
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules here