Detectives investigating a hit-and-run near Gainsborough say the teenager struck by the car was probably known to the driver.
The collision happened on the A631 at Beckingham at around 11.15am on Tuesday, April 26 and left the victim with serious injuries.
The injured man, aged 19, was taken to hospital where he remains in a stable condition, receiving treatment for a head injury.
Officers would like to hear from anyone who has not already come forward who saw a silver estate car driving in the village hall car park in Beckingham around 11am to 11.15am, or anyone who saw a man running along the carriageway.
Detective Inspector Mat Healey said: “We have had a number of witnesses already get in touch but we want to hear from anyone and everyone who witnessed what happened or the moments leading up to it.
“The pedestrian suffered serious injuries as a result of this collision and efforts are continuing to trace the driver of the silver estate, who did not stop at the scene after colliding with the man.
“At this stage we believe the injured man was known to the driver,” he added.
Anyone with information about this incident is urged to call Nottinghamshire Police on 101 quoting incident number 225 of April 26.
Or you can call the Crimestoppers charity anonymously and in confidence on 0800 555 111.