Tarunraj Singh never drove on a snow-covered
road while studying at Texas A&M, or before that in his
native India. So the teacher of mechanical engineering faced a
steep learning curve when he moved to Buffalo in 1993.
"I remember the first winter - I was doing doughnuts in
parking lots" for practice, recalled the associate professor
at the University at Buffalo. "The first time driving on snow
is a little scary."
Especially that moment when you feel the car glide off in a
direction of its own. Now, helping drivers avoid those
stomach-clenching moments is the focus of one of Singh's
research projects at UB.
Using a driving simulator - powered by a Silicon Graphics
computer and the steering wheel from a video game - Singh's
research team developed an alarm system that tells drivers to
correct their steering before their "car" pirouettes into the
ditch.
When the simulated car starts to drift on its digital test
track, a tone tells the driver to steer to the left or right.
The volume of the tone indicates how hard to turn the wheel.
Many drivers know to steer into the direction of the skid,
but "there's definitely more to it than that," Singh said.
Knowing how much to turn the wheel, how fast, and when to
turn it back is a complex set of calculations, even for a top
driver. Fortunately, its the sort of problem that a computer
chip can solve almost instantly, he said. Electronics can even
correct for the lag in drivers' reaction time by starting to
signal a few tenths of a second early.
Singh's paper - co-authored by simulator expert Thenkurussi
Kesavadas and professor Roger W. Mayne, an experienced auto
researcher - was named one of the top papers at the Society of
Automotive Engineers conference in 2000.
When it comes to winter driving conditions, Buffalo offers
plenty of the real thing. But simulator research is a lot
easier to study - and safer - than Singh's parking lot
experiments.
Twenty-five students tried the icy-road simulator at UB's
Amherst campus. After some getting used to, nearly all of them
were able to avoid crashes and control the "car" better by
obeying the alert system. The trials also found that sound
worked better than visual signals such as flashing lights,
probably because they don't draw the driver's eyes from the
road.
The research at UB is part of a wave of interest in
"intelligent vehicle" systems designed to avoid accidents,
according to the National Highway Transportation Safety
Administration. Increasingly powerful electronics in cars and
trucks are spurring a wave of systems that sense danger before
drivers can.
"We are looking at crashes and how we can use technology to
avoid them altogether," said Joseph Kanianthra, associate
administrator for applied research and former director of
NHTSA's Intelligent Vehicle program.
The potential savings from crash-avoiding technology is
high. Then nation's 6.4 million annual police-reported crashes
result in 41,000 to 42,000 deaths, 3.1 million injuries and
$230 billion in damages and medical costs, he said.
Several ideas have graduated from laboratory testing and
road track results to be incorporated into production
vehicles, especially high-priced cars. Cadillac drivers can
see hazards far out of range of their headlights with
infra-red "night vision" imaging. Mercedes has "adaptive"
cruise control that slows the car when a radar behind the
grill sees trouble ahead. Some Toyota cars use "assistive
braking" when a computer calculates that the driver needs some
help.
But Kanianthra said he wasn't aware of research being done
on systems specifically designed to aid drivers in hazardous
road conditions. The toll of damages related to slippery
conditions isn't known, Kanianthra said. Single-car crashes
that involve leaving the road - a description of most spinouts
- make up 20 percent of reported accidents.
Honda funded the first year of Singh's research to develop
the driving simulator, and Veridian added a follow-on grant,
he said. After that, interest seemed to fizzle out, and the
study went on the shelf while Singh took a year's sabbatical.
Now he's revving up the simulator in UB's Furnas Hall and
looking for sponsors to add a motion platform, to make it more
realistic. Many drivers react to forces of acceleration and
spin, as well as the view through the windshield, Singh said.
Before the system can be built into cars and trucks, there
would need to be more simulator research, followed by costly
trials with professional drivers on a test track.
Handling a car in snow takes more than research - something
that Singh can vouch for firsthand.
"I have definitely become a better snow driver," since
moving to Buffalo, Singh said. "I think it's practice."
e-mail: http://www.buffalonews.com/email/email_form.asp?author_dept_id=66