A lane of the A14 at Bury St Edmunds has been closed after two cars were involved in a crash.
Suffolk police said on Twitter the crash happened before junction 42 on the westbound carriageway at 6.44am on Monday.
The road will be closed until the carriageway is made safe, police added.
According to the AA traffic map, drivers are queuing on the road as far back as junction 43, near Bury Bowl.
For up-to-date information about the county's roads, visit our LIVE Suffolk traffic map.
Join our Suffolk Travel Information group on Facebook for all the latest traffic news in Suffolk.
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 The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.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