Police are appealing for witnesses with any information following a single vehicle collision which occurred on the A30 at Chiverton Cross flyover near Truro yesterday.
Officers were called around 7.34am to reports of collision involved a blue Kawasaki motorcycle on the eastbound carriageway.
The rider of the motorcycle, a male in his 70s from the Redruth area, sustained serious life-threatening injuries and was conveyed by air ambulance to Derriford Hospital.
The road was closed while an investigation was carried out at the scene.
Anyone with any relevant information or dash-cam footage which may assist the investigation is asked to contact police by calling 101 quoting log 208 02/6/24 or visit https://www.devon-cornwall.police.uk/