Future cars could avoid crashes by talking to one another

WASHINGTON – As a safety demonstration, it was a heart-stopper: A Ford Taurus was seconds away from cruising through an intersection when suddenly, a row of red lights pulsed on the lower windshield and a warning blared that another car was approaching fast on the cross street.

Braking quickly, the driver stopped just as the second car, previously unseen behind a large parked truck, barreled through a red light and across the Ford’s path.

The display at a recent transportation conference was a peek into the future of automotive safety: cars that to talk to one another and warn drivers of impending collisions. Later this summer, the government is launching a yearlong, real-world test involving nearly 3,000 cars, trucks and buses using volunteer drivers in Ann Arbor, Mich.

The vehicles will be equipped to communicate over wireless networks continuously, exchanging information on location, direction and speed 10 times a second with other similarly equipped cars within about 1,000 feet. A computer analyzes the information and issues danger warnings to drivers, often before they can see the other vehicle.

Called vehicle-to-vehicle communication, or V2V, more-advanced versions of the systems can take control of a car to prevent an accident by applying brakes when the driver reacts too slowly to a warning.

V2V “is our next evolutionary step … to make sure the crash never happens in the first place, which is, frankly, the best safety scenario we can all hope for,” said David Strickland, administrator of the National Highway Traffic Safety Administration.

V2V technology holds the potential to help in most crashes that aren’t alcohol- or drug-related, Strickland said. But a lot will depend on how drivers respond to the warnings, and that’s one reason for the Ann Arbor test. Overall, more than 32,000 people died in traffic accidents last year.

In addition to warning of cars running red lights or stop signs, “connected cars” can let drivers know if they don’t have time to make a left turn because of oncoming traffic. When driving on a two-lane road, the systems warn when passing is unsafe because of oncoming cars, even vehicles around a curve that the driver can’t see yet.

In a line of heavy traffic, the systems issue an alert if a car several vehicles ahead brakes hard even before the vehicle directly in front brakes. And the systems alert drivers when they’re at risk of rear-ending a slower-moving car.

It’s also possible for connected cars to exchange information with traffic lights, signs and roadways if states and communities decide to equip their transportation infrastructure with similar technology.

NHTSA has been working on the technology for the past decade along with eight automakers: Ford, General Motors, Honda, Hyundai-Kia, Mercedes-Benz, Nissan, Toyota and Volkswagen.

The technology is already available, said Rob Strassburger, vice president for safety of the Alliance of Automobile Manufacturers. He said what’s needed is for the government to set standards so that all automakers use compatible technology. Since V2V relies on wireless technology, ensuring that the safety systems are reliable and can’t be hacked is another concern, NHTSA officials said.

Together, the currently available technologies and the future V2V systems may effectively form a kind of autopilot for the road. Said Strassburger: “The long-term trajectory for these technologies is the vehicle that drives itself — the driverless car.”

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