What Google Maps' crazy level of detail means for Arizona Opinion: The insane amount of detail on Google Maps has real-life business implications. And they could come to life on Phoenix-area streets.

Google announced Wednesday it has added a significant number of mass transit lines, bringing this Google Maps function to six continents, 64 countries and 15,000 towns and cities worldwide.

Google Maps turns 15 this week, and many of the 1 billion-plus people who turn to Google’s navigation app do so for more than turn-by-turn directions.