Posted by Jonathan Maus (Publisher/Editor) on October 19th, 2011 at 12:03 pm
(Photos © J. Maus)
A research laboratory at Oregon State University in Corvallis is the first in the nation to integrate an advanced driving simulator with a bicycling simulator. When the two are connected, researchers can collect real-time data on how vehicle operators react in an extremely realistic, three-dimensional roadway environment.
Think about that for a minute.
"This is the only lab in the country where you can run a live subject on a bicycle and a live subject in a vehicle and get real time user performance response simultaneously."
— David Hurwitz, Ph.D.
Imagine the possibilities of researchers being able to do everything from testing how road users react to each other, how different road designs work (before they get built), how long a driver's eyes leave the road when they change a CD — all with subjects on both sides of the windshield navigating through real-world conditions.
Yesterday I got the chance to visit the lab and learn more about this exciting project.
Dixon, whose background is in highway design said she initially ordered a driving simulator for traditional research purposes (there are about 40 of them around the country). "Then it occurred to us," she said, "that, living in Oregon, it's pretty short-sighted if we don't do something to also capture our vulnerable road users on bicycles."
Today, their lab consists of two simulator stations. A Ford Focus sedan sits on a motion-based platform that's enveloped by three large screens (one in front, two on the sides). There's also a screen behind the car and LCD displays in both side mirrors and the rear-view mirror. The bicycle simulator station has only been up and running for about six weeks and currently has just one screen (although it too can be placed on the same, motion platform that the car uses).
"In my intro to highway design classes, they design projects on a flat piece of paper...That's the way we've done it for many many years and I think it's time to change that."
— Karen Dixon, Ph.D.
There's only one other lab in the U.S. that has a bicycling simulator; but they're not focused on transportation engineering or safety research. "This is the only lab in the country," says Dr. Hurwitz "where you can run a live subject on a bicycle and a live subject in a vehicle and get real time user performance response simultaneously."
As I sunk into the driver's seat of the car, I was immediately impressed. It subtly dips and sways just like the real thing. When I glanced out the window, buildings and trees blurred by. Stereo speakers mimicked the sound of the engines and passing cars. When I pulled into a KFC drive-through, I felt the small bumps of the driveway and then circumnavigated the building. It truly was a realistic 3-D environment.
Check out this short video which I took from the driver's seat:
As I drove around the virtual streets, graduate research assistant Lacy Brown suddenly pedaled up behind me. I first saw the bike in the rear view mirror. Then Brown passed me and was pedaling in the lane right in front of me. Situations like this can give the lab clues about things like; how much space a driver feels they need to give someone on a bike, where a bike operator prefers to position themselves on the road, how blind spots impact visibility, and much more.
"Because there's a screen behind the car, you can see the cyclist approaching," says Hurwitz, "With our onboard cameras and eye-tracking systems, we can determine if the driver actually looks in those places or not."
The epidemic of distracted driving is also something Hurwitz is eager to do more research on. "We can test how long someone's glance leaves the road when they do various tasks. We know from previous research that there's a magic threshold of two seconds — any longer than that and the risk of crashing goes up substantively."
Dixon's inspiration for the cycling simulator also speaks to another valuable example of potential research. Dixon recalls that she once pulled up to a red light in her car and noticed someone on a bike next to her leaning over. "I thought the heck are they doing. Then I realized they were just trying to see the traffic signal but the louvers were positioned for people in cars. The signal was screened from the view of people in the bike lane."
PBOT engineers face this exact problem with the cycle track on SW Broadway. Analysis shows that there's a high rate of non-compliance with traffic signals by people using the cycle track. As a PSU transportation expert told us last year, the culprit likely has something to do with how difficult the light is to see from the curbside bikeway.
If you think research like this is something that we can't afford in today's budget climate; consider this. Dixon points out that one of the major benefits of the simulators is that transportation planners and engineers can test their designs before they put them in.
"It's so expensive to build something, wait and observe it, and then decide if you did it right or not. If you can do it in a simulated environment, you can weed out a lot of issues."
Dixon teaches a highway design class, so she clearly understands how putting students behind the wheel — and the handlebars — to test their designs can be a game-changer.
"In my intro to highway design classes, they design projects on a flat piece of paper. They're supposed to be able to visualize what that looks like. That's the way we've done it for many many years and I think it's time to change that. You can make something as 3-D as you want on a computer screen, but you can't get them to understand all the different nuances of the environment."
While the research project ideas are exciting and limitless, Dixon and Hurwitz say their main focus is safety. Or, as Hurwitz puts it, "To better understand the interaction between vehicle operators, the built environment, the vehicle itself."
I was impressed not just by the high-tech lab but by Dixon's open-minded and enthusiastic approach to her work. She's eager for partnerships with advocacy groups and she'd love to hear ideas from the community about how to get the most out of the bicycle simulator.
Imagine if we had this type of system set up at the DMV?
What if we could run-through various design options for, let's say, the N Williams Avenue project?
Stay tuned for what is sure to be some important and exciting transportation research from this lab.