The Isle of Wight Ambulance Service are on scene at the junction with Station Street with 2 ambulance crews. A number of Police officers are also in attendance.
Emergency services were called to the incident at just gone 07:30.
The road is closed in both directions from its junction with High Street and the West Street crossroads. Traffic is heavy in the surrounding areas as a result.
UPDATE @ 08:55 – The motorcyclist has now been conveyed to St Mary’s Hospital. His injuries are thought to be serious but not life-threatening.
Green Street remains closed at this time whilst recovery is arranged.
UPDATE @ 12:43 – Island Echo understands that the rider has been airlifted to Southampton General Hospital with a broken pelvis.