Killer Prius?

[Eric]

Because they can be nearly silent, hybrid cars pose a serious threat of injury and death to blind and visually impaired people, says the American Council of the Blind, which is pushing the auto industry and government officials to develop ways to reduce this danger.

"Traditionally, people who are blind or visually impaired learn to rely on their hearing and tactile cues to provide them with information about their environment, which they can use to navigate safely across streets and through other vehicular ways, such as parking lots. In so doing, the sound of traffic is their primary focus," Melanie Brunson, council executive director, said in a news release from the council.

"Traffic sounds provide information about such things as the position of vehicles, their direction of travel, their rate of acceleration, and the speed at which they are likely to move. With this information, the pedestrian can make informed decisions about when to cross a street or other vehicular way safely," she said.

Without those sound cues, a blind or visually impaired person is at serious risk.

"Imagine you are a blind person traveling independently with the aid of your cane, something you have done confidently for years," Dr. Ron Millman, chair of the council's public relations committee, said in the news release.

"You are crossing a fairly busy intersection. You listen for sounds of approaching cars. All cars seem stopped. Suddenly, you hear screeching brakes. Too late, you realize a quiet, nearly silent, hybrid car is only a few inches from you. Panic takes over. Every sense of survival says to run, but where? There is not time to escape as you face this horror and possible life-threatening situation."

But this danger isn't limited to blind or visually impaired people, said Dr. Karen Gourgey, a member of the council's environmental access committee.

"Recent studies have shown that even people who are fully sighted use hearing as well as vision to make street crossing decisions, though they may not realize it. And we haven't even mentioned children and older people," Gourgey said in the news release.

The efforts of the council and other advocates for the blind are having an effect. Last week, the U.S. Federal Highway Traffic Safety Administration held its first public meeting on the issue.

[chiph]

Yes, it's a problem for the blind. But it's only temporary.

The problem is that the sounds of the electric motor in the hybrids gets overwhelmed by the sound of all the other traffic, and so there's not enough audible difference to make them stand out. Once significant numbers of hybrids get on the road, the overall level of noise will drop to where the blind pedestrians can hear them.

Chip H.

[misterdecibel]

I didn't know the Prius was capable of running exclusively on the electric booster motor?

[Eric]

I didn't know the Prius was capable of running exclusively on the electric booster motor?

Yep - up to about 30 mph, too!