An investigation is continuing into a two vehicle-crash on the A55 last week.
It happened on the eastbound carriageway between Holyhead and Valley at around 4.40pm on Wednesday 8th November.
A motorcyclist in his forties was seriously injured when his orange KTM motorbike collided with a black Honda Jazz car. He was taken to Ysbyty Gwynedd in Bangor.
PC Meurig Jones said officers were keen to speak to any witnesses who saw the manner of riding or driving of either vehicle before the crash.
Anyone with information should contact the Roads Policing Unit on 101, quoting reference no. RC17169660.