The iPhone stays silent and the screen stays dark. Persons sending a message to the user receive an automatic reply to indicates that the user is driving. For urgent messages, the sender can type the word “urgent” to ensure that the user receives a notification. The user can then pull over to read this important message or ask Siri to read it aloud. Do Not Disturb can deliver some notifications (e.g. emergency alerts, timers, and alarms). For those who use Maps to navigate, the iPhone provides lock-screen navigation help while giving turn-by-turn instructions.