Reading on an iPhone whilst travelling as a passenger in a moving vehicle can trigger motion sickness due to sensory conflict. Your eyes focus on a static screen whilst your inner ears sense physical acceleration and turns. In iOS 18, Apple introduced Vehicle Motion Cues, an accessibility feature designed to bridge this sensory divide by displaying subtle animated dots along the edges of the display that respond to vehicle movement.
How Vehicle Motion Cues Function
Vehicle Motion Cues utilises the built-in accelerometers and gyroscopes on your iPhone to detect real-time changes in direction, acceleration, and braking:
- Acceleration: When the vehicle speeds up, dots float downwards from the top edge of the screen.
- Braking: When the vehicle decelerates, dots move upwards towards the top of the display.
- Turning: When the vehicle corners left or right, dots shift horizontally in the opposite direction.
These visual cues provide peripheral feedback to your brain, aligning visual perception with vestibular motion without obscuring the central content you are reading or viewing.
Enabling Vehicle Motion Cues in iOS 18 Settings
You can configure Vehicle Motion Cues to activate automatically whenever you travel or turn them on manually:
- Open the Settings app on your iPhone running iOS 18 or later.
- Scroll down and tap Accessibility.
- Under the Vision heading, select Motion.
- Tap Vehicle Motion Cues.
- Choose your preferred operating behaviour:
- On: Displays the motion dots continuously until you disable the setting.
- Automatically: Uses on-device motion sensors to detect vehicular travel and enables the dots only when motion is detected.
- Off: Disables the feature entirely.
Adding Vehicle Motion Cues to Control Centre for Rapid Access
If you prefer toggling the cues on demand during car journeys, trains, or bus rides, add a dedicated shortcut to your redesigned iOS 18 Control Centre:
- Swipe down from the top-right corner of your iPhone screen to reveal the Control Centre.
- Press and hold any empty area of the Control Centre, or tap the + (Add) button in the upper-left corner to enter edit mode.
- Tap Add a Control at the bottom of the screen.
- Scroll to the Vision Accessibility category or search for Vehicle Motion Cues.
- Tap Vehicle Motion Cues to place the toggle in your Control Centre grid.
- Tap anywhere outside the editing area to save your changes.
Now, whenever you feel the onset of car sickness or passenger fatigue, swipe into Control Centre and tap the icon to activate or silence the cues instantly.
Best Practices for Reducing Motion Sickness on Mobile Screens
Combining Vehicle Motion Cues with additional display and posture adjustments can significantly reduce travel nausea:
- Enable Reduce Motion: In Settings > Accessibility > Motion, turn on Reduce Motion to minimise screen transitions, zoom effects, and interface parallax.
- Adjust Text Size: Larger text requires less visual strain; navigate to Settings > Display & Brightness > Text Size to make reading comfortable on bumpy journeys.
- Elevate Device Position: Hold your iPhone at eye level rather than looking down into your lap, keeping the outside horizon within your peripheral vision.
- Take Regular Breaks: Shift your gaze to distant road landmarks periodically to assist your vestibular system in recalibrating.