From Devon 7 Cornwall Police:
Police were called at around 5.20am on Wednesday 1 September after concern was raised for the welfare of a man found on the A30 near Illogan, Redruth.
Emergency services attended and the man was pronounced deceased at the scene. His next-of-kin have been informed.
The A30 is closed in both directions between Avers and Tolvaddon and is expected to remain so for some time. The Broad Lane overbridge is also closed. Motorists are advised to avoid the area.
The incident is ongoing and updates will follow when they are available.