I think the average speed along this stretch of North Decatur is around 50 mph.
From the AJC…
The eastbound car hit the woman, then turned around and drove west back down North Decatur, Gagnon said. The incident occurred near Landover Drive, in unincorporated DeKalb near Decatur.
The woman was pronounced dead on the scene, police said, and has not been identified, pending notification of her next of kin.
…There are no cross walks in the area, and Gagnon said the area was dark.