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The most immediate impetus: concerns about the safe use of driver-assistance options like automatic lane-keeping that still require drivers to pay attention. And when truly autonomous vehicles finally arrive, the consensus among automakers and their suppliers is that new ways will be needed to check on drivers and passengers to make sure they are safe inside.

“It’s really taken off from no car monitor to tactile monitoring to taking a look at your eyes,” said Grant Courville, a vice president at BlackBerry QNX, which creates in-dash software systems. “I definitely see more of that coming as you get to Level 3 cars,” he added, referring to vehicles that can perform some self-driving functions in limited situations.The feature is part of the car’s Super Cruise system, the first hands-free driving tool to operate on select United States highways. The camera tracks a driver’s head position and eye movements to ensure that the person is attentive and able to retake control of the car when needed.

Similar concerns about BMW’s semi-autonomous systems prompted the German carmaker to add a driver monitoring camera in its 2019 X5 sport utility vehicle. The video camera is mounted in the instrument cluster as part of BMW’s Extended Traffic Jam Assistant system, part of a $1,700 package, that allows the car to go autonomous — with driver monitoring — in stop-and-go traffic under 37 miles per hour.