Eli5: how does gps update new roads

Question

An intersection in my town just converted from a 4 way light to a roundabout, and the gps was changed to reflect within a week. Who does this and how???

In: 58

Answer 1

GIS. Someone goes in using a program like ArcGis PRO and creates a road and gives it coordinates and data that the GPS can then reference.

I work in GIS for my city.