A study led by the Alertness Cooperative Research Centre and Monash University assessed the crash risk of 20 hospital shift workers, reports ABC (Australia).

The technology, developed by Australian tech firm Seeing Machines, used a driver-facing camera to run a four-minute pre-drive test to measure blinking patterns and monitor alertness levels.

Lead researcher Megan Mulhall said drowsy driving was a major concern, with about 20 per cent of all vehicle crashes sleep-related.