Get Siri to give you directions from Google Maps with this key phrase
Because relying on Apple Maps' directions are less than reliable
When Google recently redesigned and re-released its Google Maps app for the iPhone/iOS, we all cheered--because this maps and navigation app just works. However, to get Google Maps to work with Siri for directions, you need to know the lingo.
Although you can jailbreak or use other tweaks/apps to integrate Siri with Google better, Jailbreak Nation demonstrations all you have to do is say "via transit" at the end of your request to Siri.