It occurred at 5.15am on Sunday 2 March 2014, on Knaresborough Road, near the junction for Harrogate District Hospital, when a dark coloured taxi, heading toward Knaresborough, was overtaken by a silver BMW and a dark coloured car.
The key witness officers need to trace is the driver of the taxi.
Traffic Constable Steve Wood, of the Force’s Roads Policing Group, said: If you are the driver of the taxi which was on Knaresborough Road, at the time of the incident, I urge you to come forward and contact the police straight away as you may have vital information which could help my investigation.
I am also keen to speak to anyone else who was in the area at the time and ask them to get in touch.
Anyone who can assist with this enquiry should contact Harrogate police on 101, select option 2 and ask for Steven Wood. Alternatively, information can be emailed to email@example.com
Or call Crimestoppers anonymously on 0800 5551111, quoting reference number 12140033772.