Alexandria Nicole Simou, 40, of Chapel Hill, passed away at UNC Hospital. Investigators said 41-year-old Ivin Levander Scurlock, of Carrboro, died at the scene last Thursday when the pair was hit on U.S. Highway 15/501 at Wave Road.
The North Carolina Highway Patrol said a Pittsboro police officer found the cyclists in the middle of the highway about 11:30 p.m. Thursday.
Authorities said Scurlock was wearing a reflective vest at the time of the accident.
Authorities are currently looking for a vehicle with front-end and windshield damage, but they did not know the make and model. Anyone with information is asked to call the Hillsborough Highway Patrol at (919) 732-2551 or the Raleigh Highway Patrol Communication Center at (919) 733-3861.