Apple · Engadget
There, disable Announce Messages and Siri won't read anything that comes in during a trip
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Don’t let Siri become a hassle instead of an assistant; keep it quiet in the car to reduce distractions.
Key facts
- For a similar option in Apple Maps, visit Settings > Apps > Maps > Spoken Directions to soften the Voice Volume
- Contacts Only silences spam calls while driving, or you can limit it to your chosen list with Allowed People Only
- Finally, scroll down to tap While Driving and make sure Activate With CarPlay
- Back on the Announce Notifications page, you might also want to turn on Reply Without Confirmation
Summary
Even though CarPlay makes it safer to use your phone's features while driving, it can still become distracting, like when group chat messages pop up and grab your attention. Hearing the assistant constantly talk over your music, podcast, or in-car conversation with announcements is annoying and potentially dangerous. You can't completely disable Siri, since CarPlay won't work without the feature enabled. The best way to hush Siri while you're driving is to use the applicable Focus mode.