The A46 at Nettleham has been closed by police following a collision.
Two cars were involved in the crash near to the Brown Cow pub at around 3.25pm on Wednesday, January 17.
Emergency services were called to the scene and police have described the incident as serious.
A Lincolnshire Police spokesperson said: “The A46 has been closed at the roundabout with the Lincoln Bypass and traffic is expected to be heavy.
“We advise road users to avoid the area where possible.
“We will update with further details when we can.”