SAN FRANCISCO (AP) — Google’s mapping service for mobile devices is getting an upgrade as the Internet search leader braces for new competition from iPhone maker Apple.

The improvements center on listings for public transportation options in nearly 500 cities around the world. Wednesday’s update includes suggested routes and departure times for more than 1 million stations worldwide, about 50 percent more than a year ago. At some stations, Google will provide indoor directions to help riders navigate the system.