There are delays on Norwich Road, Valley Road and Chevallier Street after a collision between a van and a bike.
Police were called to the scene by the ambulance service at 7.40am.
The van involved was a Ford Transit.
A spokesman for the ambulance service said a man in his 40s was treated for chest injuries. He was then taken to Ipswich Hospital.
The spokesman confirmed a rapid response car, a paramedic officer and an ambulance were sent to the scene.
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