The driver who hit the individuals stopped, Callaway said.
The victims have not been identified, pending notification of next of kin.
Multiple drivers stopped to offer aid, police said.
The incident happened sometime before 11:30 a.m. at the northbound on-ramp from Jonesboro Road. The ramp was closed while an accident reconstruction team investigated, Callaway said.
Two of the four lanes of I-75 also were closed, according to the Department of Transportation, and traffic was backed up for about three miles, stretching south into Henry County.
Traffic was cleared by 2 p.m.
Please return for updates.