The A16 roundabout at Kirton is currently closed while emergency services deal with a road collision there.
The incident, involving three vehicles, took place on the A16 at about 2.30pm today.
A police spokesman said an elderly occupant of one of the cars has been taken to Pilgrim Hospital as a precaution.
There are not thought to be any serious injuries involved.
It is thought traffic travelling south from Boston is being diverted along London Road at the ATS roundabout.