A man, aged in his 20s, was brought by ambulance to Cork University Hospital Gardaí are appealing for witnesses to the collision that occurred at approximately 6.50am on the M8 (J18) motorway southbound, Upper Riverstown in Glanmire. The road remains closed to facilitate a technical examination by Garda Forensic Collision Investigators. Gardaí are appealing to anyone who may have witnessed this collision to contact them.