The top of Canwick Hill in Lincoln is partially blocked after a crash at around 10.15am on Wednesday.
It happened on the B1188 Lincoln Road at the junction of Canwick Avenue and Canwick Hill near the International Bomber Command Centre.
There are delays in the area as the road has been partially blocked by emergency services attending.
Ambulance crews, Fire & Rescue and police are on scene.
Initial reports indicate a Ford Fiesta has rear ended another car and gone onto the grass verge.
Minor injuries were reported, Lincolnshire Police said.
“One lane of the road has now opened but there is still likely to be some disruption while the vehicles are recovered,” a force spokesperson added.