Although, since there have not been any major map updates recently, the reason of this feature-spread to other parts of the United States is being speculated as the result of a server-side switch.
While change has been slow, over the past year eagle-eyed developers have spotted evidence of Google Maps (download for Android and iOS) testing out some of Waze's most beloved features within its own app - like user collected traffic reports, on-screen speed limits and potential speed traps. The feature, which was introduced in 2017, was previously only working in two metropolitan areas: Rio de Janeiro and San Francisco. Seeing as Google Maps has added most of the features that Waze has available. However, Android Police has received multiple tips that speed limits are now live for people in New York City, Los Angeles, and Minnesota.
It's kind of ridiculous it's taken Google this long to integrated speed limits into Maps, but either way, it's still exciting to see this starting to roll out. In November, Google Maps conducted a speed traps test, which will help it improve vehicle incident evaluations in the future. There has been no word from the search-engine giant as yet confirming the expansion of the "speed limit" feature on Maps across U.S. or globally. Android Police originally caught the addition in November and December but it seems like it's being rolled out more widely now.
Waze, the Israeli map app that Google paid $1.15 billion for in 2013, is more focused on navigation for drivers compared to Google Maps, which caters mostly to users who travel on foot and use public transport. It's a very popular feature on Waze because it does allow users to see how fast they should be going.