A gas delivery tanker broke down at 7.30am on the A47 Yarmouth Road roundabout near Cucumber Lane.
Police are on scene and have created a single lane using cones on the westbound road while they await recovery of the vehicle.
Traffic is moving slowly and delays are expected until the tanker is recovered.
A gas delivery tanker broke down at 7.30am on the A47 Yarmouth Road roundabout........