It could be a while before the Google self-driving car takes us to work. So until then, Google is rapidly expanding its Maps application to keep up with the likes of Uber.

Real-time bus and train information was already available in places such as New York City which just released its own Bus Time app this week but the mapping mammoth has added more than 25 partner cities in four countries to its arsenal of places with real-time transit directions, the company announced Tuesday on its blog.

"This real-time transit info will let you see live arrivals for buses, metros, and subway systems and even alert you to canceled routes," the blog post says. "So you can better navigate the intricate and unpredictable world of transit in major cities around the world."

Apple Maps, the longtime underdog to Google's cartographic services, added public-transportation directions only in May.

Google, on the other hand, now says its transit directions are available in more than 18,000 cities in 64 countries and six continents.

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