A woman was seriously injured and two children hurt after a collision on the Sheffield Parkway.
Police said a white Mercedes Sprinter panel van was travelling towards Sheffield city centre when it collided with the rear of a white Mercedes 308D which had broken down in the nearside lane, just before the Handsworth exit.
Officers called to the collision on Monday, at about 6.20pm, said a 27-year-old man had been driving the Sprinter.
A 27-year-old female passenger was taken to hospital with serious injuries along with two children in the vehicle – a two-year-old child, who suffered a broken leg, and a six-month-old baby who suffered slight injuries.
The driver of the broken-down van – a 48-year-old man – escaped unharmed because he was on the grass verge near his vehicle at the time of the collision. He had left his van with hazard lights on.
Police arrested him for being over the drink-drive limit and bailed him pending further inquiries.
Officers want to hear from anyone who may have seen the broken-down van before the collision, or anyone who may have witnessed the smash itself.
n Anyone with information is asked to call South Yorkshire Police on 101, quoting incident number 1044 of Monday, July 15.