To turn off these notifications, follow the steps below.
- Open the Google app.
- Tap the Menu at the top-right corner.
- Tap Settings.
- Tap Notifications.
- Select Google Now traffic.
- Toggle off all notifications related to traffic.
- Done.
Alternatively, you can turn off all traffic notifications from the Android Settings. Go to Settings > Apps > Google > Notifications and toggle off the Notifications for Google Now.
I hope this helped you turn off Google Now traffic notifications.