UPDATE 4.00pm: The road is now clear.
UPDATE 3.50pm: It is belived the motorcylist has broken legs but no life threatening injuries.
Cars are being diverted away from a serious crash near Holbeach.
A car and a motorbike have collided along the A17 Saracen's Head Junction, where it meets with Saltney Gate.
The crash happened just before 2pm.
The motorcyclist was injured, but it is not thought to be life threatening.
The road is blocked and has traffic queuing in both directions.
Diversions are in place.
We will update this article as more information becomes available.