The incident occurred on the west-bound carriageway near the Bullionfield Filling Station around 11.00am on Friday 22 July 2022.
The 57-year-old was killed at the scene after being hit by a lorry.
“Enquiries are at an early stage,” said Sergeant Stephen Livesey of the Road Policing Unit. “We are keen to speak to anyone who was in the area at the time or has dash cam footage of the incident.”
Anyone with information is asked to call 101 and reference incident 1145 from July 22, 2022.