The article below describes the 2016 Prius support for the Intelligent Transportation System (ITS) currently in operation in Japan. The USDOT is researching a system with similar goals (i.e., crash avoidance, traffic management, pedestrian safety, reduce environmental Impacts) Toyota's new Prius is one of first that talks to other cars | PCWorld
I read about proposals for this system about five years ago in an article in Spectrum, the magazine of the Institute of Electrical & Electronics Engineers (IEEE), and I'm pleased to see it's now actually in use -- in Japan, at least -- and that Toyota is supporting it.
I suppose nothing I say will stop the advancement of said technology. And I was just thinking the other day, that it's interesting to me, that my $23,000 dollar Prius, can't tell me what the speed limit is in the area I'm driving BUT my $140 Garmin can and does. So I'm OK with some of this technology being integrated into the automobile. There IS a line I don't want to cross with too much automation, or too much being monitored.
I think speed limits were finally added for the MY14 Entune Premium Audio units (the 2013 Highlander had speed limit info w/ its head unit).
Future Toyota Integrated Safety Systems (2015 Edition) | PriusChat and Toyota Bringing Advanced ITS Technology to Mass-market Models | TOYOTA Global Newsroom