Summary
- Safety information needs stable registration, sparse priority and behaviour that degrades safely in rain, glare and poor maps.
- Entertainment should be locked away from the driver’s task and evaluated separately from assistance.
Road AR can place navigation or hazard cues near the scene they describe, reducing the need to look down. But a late, drifting or crowded overlay can pull attention from pedestrians and signs. Designers should measure glance time, false alerts, calibration loss and recovery across real driving conditions, with a simple off state. The next useful evidence is an independent comparison against a conventional display during difficult but controlled scenarios. The technology earns a safety role when it lowers cognitive work without asking the driver to supervise the interface.
