Apple adds Maps transit information for six Ohio cities
The intensity at which Apple has added these new cities isn't typical, as the company usually onlu one or two cities at a time, no matter if it's within the U.S. or elsewhere. It takes special attention to get access to and implement each city's unique transit data. However, Apple sometimes makes an exception – and, just like that, it added transit data for the whole of Japan in one swift move.
The new transit routes and information should be available to everyone with an iPhone running a reasonably recent iOS version.
source: Apple Insider