Apple’s Maps app — you know, the one you ignore because you have Google Maps — is due for a big upgrade when iOS 9 comes out, according to 9to5Mac. The update will reportedly include bus, subway and train directions in major cities, and will be displayed at the Worldwide Developers Conference in June. There may be lots of big wheels in the Detroit area, but there’s only one big tire. [...] last week, to celebrate the 50th anniversary of the Giant Uniroyal Tire off Interstate 94, the owners allowed guests inside the 80-foot-high, 11- to 12-ton tire. The Daily Briefing is compiled from San Francisco Chronicle staff and news services.