The A18 is closed in both directions after a lorry overturned.
Recovery work is ongoing at the site of the crash near Grasby Road in Great Limber, to the south of Humberside Airport.
Motorists should avoid the area and find alternative routes.
A spokesperson for Lincolnshire Police said that it appeared that the lorry had hit a lamppost, with the incident reported to the force at around 8.30am.
No-one was injured in the crash.