In particular, officers would like to speak to the drivers of two sliver cars who stopped at the scene of the collision near Weeton station.
At around 8.40am on Sunday 20 November, the taxi, a white Toyota Avensis was travelling from Knaresborough towards Huby on the A658 when it collided with the wall, causing substantial damage to the brickwork and a road sign. The car then came to rest on the opposite side of the road.
No other vehicles were involved in the collision and the driver, a 29-year-old Keighley man, was uninjured.
TC Tracy Smales of Harrogate Roads Policing Group, said:
We believe two drivers kindly stopped at the scene of the collision to provide assistance. They were both driving silver cars, we believe one was a BMW.
I would like to speak to these motorists as they may have important information which could help our investigation.
I would also like to speak to any other motorists who were driving along the Knaresborough to Huby road on Sunday morning and saw the taxi on its journey, or anyone who witnessed the actual collision.
Anyone with any information is asked to contact TC Tracy Smales on 0845 60 60 247, quoting reference 12110196404.