Blind Drivers Test Retrofitted Car

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Thanks to a team of engineering students, several blind drivers had the chance to test-drive a new car that doesn't require sight.

On Friday, 20 blind people took turns taking control of a retrofitted four-wheel dune buggy designed by students at the Virginia Tech College of Engineering in Blacksburg, Va. The event was part of a program organized by the National Federation of the Blind to encourage high school students to pursue careers in science and technology.

The high-tech car was developed in response to a challenge issued to university students by the National Federation of the Blind's Jernigan Institute in 2004. Virginia Tech answered the call with a proposal in 2006 (the lone university to do so) and received a $3,000 grant to launch the project.

Video: Retrofitted buggy gives blind people a chance to drive.
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The car uses laser range finders, voice command software and other sensory technologies that help blind drivers navigate.

In July, Wesley Majerus, an access technology expert for the National Federation of the Blind, became the first blind person to drive the Virgina Tech car.

"At first, I was kind of nervous," Majerus, 28, said. "But once I got the hand of how it all worked, it was liberating."

Multisensory Interface Provides Non-Visual Cues

Under the guidance of Dennis Hong, a mechanical engineering and robotics professor, nine undergraduates designed and constructed the car.

Inspired in part by technology that powers autonomous vehicles (cars that navigate without drivers), Virginia Tech's Blind Driver Challenge Team designed a multisensory interface that scans the environment for obstacles and gives the driver non-visual cues.

For example, a vest worn by the driver vibrates on one side when the driver needs to slow down and shakes entirely when the driver needs to come to a complete stop.

The laser range finder, which is connected to the steering wheel, uses a laser beam to determine the car's distance from the edge of the road and other objects. As the driver accelerates the car, a voice tells him how far to turn the wheel by indicating the number of "clicks" he must make. One click corresponds to about five degrees.

Hong said that while the project is intended to help the blind, the applications could extend to the entire population.

Technology Could Have Non-Driving Applications

"I get a lot of questions from people about why we are doing this," Hong said. "There are immediate applications, of course, for the car, for people who are blind. But the spinoff potentials are huge."

Non-visual cues could be used as advanced warning systems inside regular cars for sighted people to establish safer driving, he said.

The technology could also inspire other non-driving applications for the blind.

Greg Jannaman, the project's team leader who just graduated from Virginia Tech, said he has been flooded with e-mails from people around the world suggesting different uses for their technology.

A blind woman e-mailed him about the possibility of fitting her walker with technology that would help her navigate city traffic more safely.

Someone else suggested using the vibrating vest and laser range finder to help low-vision farmers operate machinery in the field.

"[It's] a redundant system to help improve the quality of life," the 22-year-old Jannaman said.

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