Cutting Edge

Today's self-driving devices

John Markoff and Somini Sengupta / New York Times News Service /

PALO ALTO, Calif. — Driving around a college campus can be treacherous. Bikes and scooters zip out of nowhere, distracted students wander into traffic, and stopped cars and speed bumps suddenly appear.

Jesse Levinson does not worry much about this when he drives his prototype Volkswagen Touareg around the Stanford University campus here. A computer vision system he helped design keeps an unblinking eye out for pedestrians and cyclists, and automatically slows and stops the car when they enter his path.

Someday soon, few drivers will have to worry about crashes, whether on congested roads or on empty highways, technology companies and car manufacturers are betting. But even now, drivers are benefiting from a suite of safety systems, and many more are in development to transform driving from a manual task to something more akin to that of a conductor overseeing an orchestra.

An array of optical and radar sensors monitor the surroundings of a growing number of cars traveling the nation’s highways and, in some cases, even track the driver’s physical state. Pedestrian detection systems, like the one that Levinson, a research scientist at Stanford’s Center for Automotive Research, has helped design, are already available in luxury cars and are being built into some midrange models.

The systems offer auditory, visual and mechanical warnings if a collision is imminent — and increasingly, if needed, take evasive actions automatically. By the middle of this decade, under certain conditions, they will take over the task of driving at both high and low speeds.

But the new systems are poised to fundamentally refashion the nature of driving long before autonomous vehicles arrive. “This is really a bridge,” said Ragunathan Rajkumar, a computer science professor who is leading a Carnegie Mellon University automated driving research project partly financed by General Motors. “The driver is still in control. But if the driver is not doing the right thing, the technology takes over.”

Although drivers — at least for now — remain responsible for their vehicles, various legal and insurance issues have already arisen, and researchers are opening a line of study about how humans interact with the automatic systems.

What the changes will mean to the century-old U.S. romance with the car remains to be seen. But the safety systems, the result of rapid advances in computer algorithms and the drastically falling cost of sensors are a practical reaction to the modern reality of drivers who would rather talk on the phone and send text messages than concentrate on the road.

Four manufacturers — Volvo, BMW, Audi and Mercedes — have announced that as soon as this year they will offer models that will come with sensors and software to allow the car to drive itself in heavy traffic at speeds of up to 37 mph. The systems, known as Traffic Jam Assist, will follow the car ahead and automatically slow down and speed up as needed, handling both braking and steering.

At faster speeds, Cadillac’s Super Cruise system is intended to automate freeway driving by keeping the car within a lane and adjusting speed to other traffic.

Already, actions like steering, braking and accelerating are increasingly handled by software rather than the driver. “People don’t realize that when you step on antilock brakes it’s simply a suggestion for the car to stop,” said Clifford Nass, a director at the Center for Automotive Research at Stanford. How and when the car stops is left to the system.

The automobile industry has been motivated to innovate by growing evidence that existing technologies like antilocking braking systems and electronic stability control have saved tens of thousands of lives.

In November, the National Highway Traffic Safety Administration recommended that all new cars be equipped with collision avoidance technologies, including adaptive cruise control and automatic braking. Two states— California and Nevada — have passed laws making it legal to operate self-driving cars as long as a human being is inside, able to take over.

Innovation and deployment of crash-resistance technologies accelerated after 2010, with news that Google had a secret program to design self-driving cars. Google has not said whether it intends to sell its vehicles. However, the search engine company has actively lobbied for laws in several states legalizing autonomous automobiles. Ten automakers have advanced research laboratories based in Silicon Valley.

Also playing a role in the speed with which safety changes are being made are component suppliers like Bosch and Mobileye, an Israeli company that specializes in cameras mounted to look forward from the car’s rearview mirror, and elsewhere on advanced vehicles.

The actions of drivers, too, are being rethought. When drivers are no longer required to maintain a constant vigil on the road ahead, it will still be necessary to reclaim their attention in emergencies. Nass is establishing an automotive industry consortium to develop computerized systems that make it safer to switch back and forth from human to computer control.

Rajkumar said he suspected that most Americans were not quite ready for a fully autonomous car. But, he said, “In time, as society becomes more comfortable and legal concerns are ironed out, full autonomy will become practical, inevitable and necessary.”

He, for one, would welcome an automated car for his 30-minute commute home. If the car could drive itself, he said, he would happily take a nap.

While cars that drive themselves are still in the experimental phase, many computerized systems currently available offer assistance to drivers with parking, adaptive cruise control and even keeping an eye out for pedestrians.

Changing how we drive

Already in some cars:

• Antilock brakes

• Electronic stability control

• Lane keeping, lane departure warning

• Pedestrian detection

• Driver fatigue/distraction alert

• Cruise control/adaptive cruise control

• Forward collision avoidance

• Automatic braking

• Automated parking

• Adaptive headlights

• Traffic sign detection

Coming soon:

• Traffic jam assistance

• Super cruise control

• Night assistance thermal imaging

• Seeing around corners

• Intersection assistance

Source: New York Times News Service

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