A woman from Millom, identified as 51-year-old Tatiana Grieve, has died after being hit by a HGV on the M6.
The incident happened at around 12.27am on Tuesday 19 December between junctions 36 and 35.
The driver of the HGV was a 54-year-old man from the Leeds area.
Police are appealing for anyone who may have seen Mrs Grieve or her vehicle, a silver Toyota Rav 4, on the M6 just south of junction 36 at approximately 12.10am.
Anyone with any information should email email@example.com or call 101 and ask to speak to PC 2190 Batley quoting incident number 4 of 19 December.