Siri can help you get to your destination even if you do not use Apple Maps.
By saying “Give me directions to [your_destination] via transit”, Siri will give you a list of routing apps and let you choose which one you want to use. You can also use “Give me directions via transit” and Siri will ask you where you want to go, then show you the options for routing apps.
This is helpful if you prefer to use Waze, Google Maps, or any other routing app available. You will even get a list of apps available for download in the App Store.
How do you like Apple Maps? Do you prefer using Google Maps? Waze?