The southbound lane of the A46 Lincoln bypass is closed near to Pennells roundabout due to a collision.
Lincolnshire Police said the crash happened at around 7.40am on Tuesday, January 29.
It involved a car and a motorbike.
A spokesperson from the force posted on social media: “We are advising motorists to find an alternative route.”
Traffic is already building in the area and delays can be seen spanning back to Witham St Hughs at the time of writing.
Are you in the area? Help keep others informed by contacting our newsroom on [email protected] or calling 01522 837217.