The road was closed for three-and-a-half hours to allow officers to carry out investigations at the scene. Officers would like to hear from anyone who witnessed the collision or saw the motorcyclist prior to it.
Anyone with any information should contact Totton Roads Policing Unit, quoting Operation Froggen, on 101, or the Crimestoppers charity anonymously on 101.
More top news
It comes after a report found more than 450 patients had their lives shortened after being prescribed powerful painkillers.
“Shocking” revelations over deaths at a hospital lead most of the papers.
Amanda Spielman will tell the Festival of Education she also supports schools that take a tough stance on unruly pupils.