A hit-and-run van driver, who drove between two lanes of stationary traffic at rush hour in Harrogate, struck a car containing two young children.
The children, aged just 18 months and nine years, were unhurt in the crash on Knaresborough Road at 5.50pm on Friday.
But police say the car they were travelling in, a red Rover driven by a 32-year-old local man, suffered “considerable damage”.
TC Stuart Holden, of North Yorkshire Police’s Roads Policing Group, said: “It may be that the driver of the van involved is not aware of the collision.
“I ask them to come forward so that I can take a statement from them about the incident.”
Police say the red Rover had been driving towards Harrogate when the white van, driving down the middle of the road past stationary traffic, turned sharply into its path.
“The white van failed to stop and sped off down Wedderburn Avenue,” said TC Holden.
“I need to speak to anyone who witnessed the collision and ask them to get in touch.
“I am also keen to speak with people who work in vehicle repair shops as I believe that the van will have been damaged.
“Anyone who is asked to carry out repairs to white vans is urged to contact the police as soon as possible.”
Anyone with information is asked to call Harrogate police on 101, press option 2 and ask for Stuart Holden. Alternatively, information can be emailed to firstname.lastname@example.org.
Crimestoppers can be called anonymously on 0800 555111 quoting reference number 12130066281.