The Problem with Self-Driving Cars…Is You

Automated driving software in cars, known as Advanced Driver Assistance Systems (ADAS), have come under fire lately from many quarters.

In light of recent fatal crashes involving cars equipped with driver-assisted technology, regulators have started to scrutinize its effectiveness in reducing accidents. Previous advocates of the technology are now reassessing the benefits of the safety system in light of its demonstrable limitations.

What has spurred current skepticism about these safety systems when previously there was unbridled faith in their utility?

In March, 2018 Tesla’s ADAS, marketed as “Autopilot,” played a role in a crash that killed the driver of one of its Sports Utility vehicles. Tesla’s identical driver assisted technology was also involved in a fatal crash in Florida in 2017.

The National Transportation Safety Board (NTSB), found that Tesla’s autopilot contributed to the fatal accident because it allowed the driver, Joshua Brown, to operate the vehicle for long periods without his hands on the wheel. Mr. Brown had the autopilot engaged when his Tesla Model S hit the underside of a tractor trailer that was crossing the road.

These tragic incidents have prompted a question among engineers, futurists, regulators and automobile manufacturers alike: How could a much-trumpeted and novel safety feature have been responsible, in part, for deadly crashes?

Over-hyped

ADAS has backfired because it is now clear that there was too much faith in an untested technology. A few years ago, Google, Uber, and urban planners declared authoritatively that driverless vehicles would take over our roadways within the next five years. Advanced AI computers and ADAS would make this entirely feasible, they claimed.

How quaint all these predictions seem now.

Numerous TV commercials touted the awe-inspiring reliability of ADAS advanced technology and safety systems. In one ad, a woman is driving, drops something, takes her eyes off the road, then looks up in horror as a couple are crossing the road with a baby carriage. Disaster is averted as the vehicle’s radar sensors in milliseconds brake the car automatically, saving the couple from certain death.

The unfortunate deaths now associated with use of the technology have now caused many previously staunch advocates of driver-assisted systems to reassess not only the timetable for successful implementation, but whether the practical application of the capabilities is not what was envisioned.

ADAS, which is one of the key components of self-driving, fully autonomous vehicles, has its skeptics. Anshuman Saxena is senior director for ADAS at Qualcomm, a company whose chips will be used in the AI hardware module for self-driving cars. He acknowledges that a fully autonomous vehicle “is still not realistically going to be available in the near term.”

Additionally, ADAS proponents failed to account for those situations where self-driving systems, due to unanticipated external environmental forces, broke down.

The difficulty with accepting new technology is that it encourages the introduction of new techniques that, even if they are helpful in avoiding collisions, are not entirely safe or can be trusted to perform as designed or warranted.

Rodney Brooks, an MIT roboticist and artificial-intelligence expert, called these situations “edge cases” — unusual circumstances that ADAS and autonomous cars would have to handle. Brooks argued that these edge cases and perceptual challenges are too numerous and are “way beyond those that current developers have solved with deep learning networks.”

Problems with ADAS

Perhaps one of the most significant problems with ADAS is that its designers failed to account for how human behavior and psychology could work in tandem to frustrate the intended operation of the safety systems. The AAA Foundation for Traffic Safety conducted a recent analysis of the effectiveness of ADAS and its counterintuitive findings are as telling as they are remarkable.

The study concluded that those drivers with experience using ADAS were twice as likely to engage in distractions while driving compared to when they were driving with the driver-assisted systems disengaged. An instructive corollary to these findings was that drivers with little experience and familiarity with the ADAS technology and its capabilities were less distracted with the system activated compared to when they were driving with the ADAS system shut off.

The research findings suggest that as drivers become more adept at using ADAS technology they are more likely to develop complacency behind the wheel or develop undue faith in the system.

“Over-reliance on these systems can put drivers and others in dangerous conditions during critical moments,” said executive director of the AAA Foundation for Traffic Safety, Dr. David Yang.

Additional findings

Similar driver behavior was responsible for an Uber autonomous vehicle crash that killed a pedestrian. The NTSB found the proximate cause of the Uber collision was the failure of the safety operator to monitor closely the car’s ADAS driving system while keeping his eyes on the roadway.

The driver instead took his eyes off the road while looking at his cellphone. The NTSB also faulted Uber for the lack of an effective system to address safety operator “automation complacency.”

Supplemental research at Virginia Tech confirms the AAA Foundation findings. The Virginia Tech study found that users of ADAS undergo a cycle of behavior associated with their use of the driving assistance system. The researchers found that, over time, drivers reach an experienced or familiar phase where over-reliance and undue trust in the driving assistance technology becomes more common.

These particular drivers are more prone to take their eyes and attention away from the road and become easily distracted. What many drivers fail to appreciate is that at 60 MPH it takes only seconds for their car to travel long distances; a few seconds looking down can have catastrophic consequences.

As evidenced from recent studies, driver distractions or misuse of ADAS systems can be lethal. That is the current issue that has raised numerous questions by regulators and engineers alike about the wisdom or claimed safety benefits of the autonomous or driver assisted technologies.

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