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Despite Billions Invested, Autonomous Cars Still Face Challenges

Updated: Oct 21, 2019

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Self-driving vehicles struggle with simple moves such as merging into traffic or turning left, and yet it seems to be an inevitable conclusion that they will eventually take over from human drivers.

Billions of dollars are being invested and new laws are being enacted to support development of autonomous vehicles, but challenges still flourish. One answer might be to limit self-driving cars to routes with controlled intersections, but this wouldn’t address other dangers such as safely driving across sidewalks to access driveways.

Cities could reconfigure infrastructure to suit self-driving cars, but only at an exorbitant cost. A far cheaper path would involve restricting pedestrians and bikes from all access routes that intersect public roads. However, that would be a formula for conflict. So how will cities and this new technology adjust to each other?

An interim technology such as Level 4 autonomy could help. In this case the car requires a human driver who can take control when needed. The whole concept of efficiency is destroyed, but it also gets worse. The driver must remain in supervisory limbo and yet somehow stay alert in case of a sudden emergency such as a child dashing in front of the car. Such drivers will be saddled with an impossible responsibility and may not be able to do the job in a dependable fashion.

With fully autonomous cars, the legal liability for fatal collisions has yet to be addressed. Who is to blame? Is it the car maker or the car owner? If a driver less car hits a black-clad pedestrian invisible in a nighttime rain, who will be held legally responsible? The usual course is to determine the outcome in a lawsuit. Even if the government creates legislation with great foresight, which seldom occurs, the first few suits will be appealed to the Supreme Court, which might take years to resolve. In the meantime, vehicle engineering will continue producing more non-litigated technology that would only add to an ongoing mess. In the United States for instance, a conservative-leaning high court may well side with the Giant Car Company of America, meaning that the car owner will bear legal responsibility for the car’s behavior.

Arizona recently stepped up to promote itself as a driver less hub in the United States. The wording of the governor’s 2015 executive order suggests that its rationale is biased toward economic gains as opposed to safety concerns. It may also suggest that the legislative future already tilts against car owners. In a similar manner, the U.S. House of Representatives passed the Self Drive Act that provides some exemption from safety standards for each car maker’s first 100,000 driver less cars.

The future of driving need not become a robot-driven drama in which car owners take most or all the blame for their vehicle’s behavior. Consider the technology already in place for vehicles in fully controlled settings, such as trains or subways. These vehicles run on fully restricted access roadways (rails) equipped with automatic signal systems for the driver, and yet collisions between trains still happen. The presence of a driver is not enough to prevent an accident. Instead, these deadly events are almost eliminated by collision-avoidance braking systems wherever they are used. Braking is the crucial. So, it’s clear that our cars need automated brakes as well as fully engaged human drivers more than they need total autonomy. The best part is that this technology can be executed very quickly with benefits flowing to the public instead of waiting for some undefined future court challenges.

Until now, the handful of deadly crashes with self-driving cars are isolated events. That’s because each of those cars was alone in a world of human-driven traffic. Who is to say how that will change in a sea of Level 5 fully autonomous cars? How will those auto-piloted cars react to other cars on autopilot? If one car swerves and brakes to avoid a dog at an intersection, its neighboring cars will swerve and brake as well. Collisions and blame could multiply instead of being averted.

Should we accept the technological benefits along with unfair liability? The solution to this technological issue can be straightforward. Implement the features of driver less cars that are most urgently needed. Fully autonomous cars reduce the risk of driving by eliminating excessive speeding. They do not have a driver, which also means no drunk driver.

Nonetheless, nothing stops us from implementing speed-limitation and drunk-detection systems in next year’s human-driven cars. Combined with automated emergency braking, most problems can be easily solved without rushing to introduce a suite of new technological and legal problems.

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