Around 6.55pm the teenager was crossing Central Way when he was struck by a Land Rover.
Emergency services attended the scene and he was taken to University Hospital Monklands with serious injuries, medical staff describe his condition as stable.
Police are particularly keen to talk to the driver of a white hatchback.
Sergeant Craig Beaver, Motherwell Road Policing Unit, said: “We are still appealing for anyone who was in the area that night who may have witnessed the incident take place, and have not yet spoken to police, or may have seen the Land Rover vehicle beforehand.
“We know from CCTV footage that a white hatchback is driving on the same bit of road at the time of the incident and appeal for the driver of that car to come forward.”
Anyone with information should contact the police via 101.