He was unresponsive at the scene. Members of the public assisted before paramedics arrived.
The man was taken to the West Cumberland Hospital where he died a short time later.
The road was closed for four hours from the Sandwith junction to the Wilson Pit Road junction while police carried out investigations. Motorists and pedestrians were asked to use alternative routes.
Anyone who witnessed the crash is asked to contact Cumbria Police on 101 or Crimestoppers anonymously on 0800 555111.
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