Instruction overrides allow us to simplify some segment names. Previously, some segments where artificially named in order to generate adequate instructions. Before we rename or merge these segments, the feature needs to have gone live to all clients.
Ideally, all road turns for which there are physical destination signs on the road will have a turn instruction override to represent that information in the audible and visible instructions in the app. If there are several signs, only copy the destinations on the blue directional signs (exception: industrial zone names on white signs). This is a great improvement over the default turn instructions, that only give an idea of what sort of turn to take and the street name you'll be going to.