Cheshire Police is appealing for witnesses following a collision on the M6 over the weekend.
The incident took place on Saturday 19 April on the northbound carriageway at Bradwall near Sandbach at 9.30am.
A blue Suzuki motorbike was in collision with a silver Fiat Punto.
The motorcyclist − a 25 year old man from Staffordshire – was airlifted to North Staffordshire University Hospital in a critical condition.
He sadly died on Sunday 20 April.
Enquiries are ongoing and anyone who witnessed what happened or has any information which could assist officers with their enquiries is urged to call Cheshire Police on 101 quoting incident number 267 of the 19 April.
Information can also be left anonymously via Crimestoppers on 0800 555 111.