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Researchers Test Drive Bus With Automated Steering
An anonymous reader tips us to news that researchers at University of California, Berkeley, have successfully test driven a 60-foot bus that controlled its own steering. Sensors on the bus detected magnets that had been embedded in a San Leandro road, and it was able to reach stops within one centimeter of its desired position. Acceleration and braking during the test were controlled by a human operator, but the system is capable of handling those as well, and has done so on test courses.
"... sensors mounted under the bus measured the magnetic fields created from the roadway magnets, which were placed beneath the pavement surface 1 meter apart along the center of the lane. The information was translated into the bus's lateral and longitudinal position by an on-board computer, which then directed the vehicle to move accordingly. For a vehicle traveling 60 miles per hour, data from 27 meters (88 feet) of roadway can be read and processed in 1 second. Zhang added that the system is robust enough to withstand a wide range of operating conditions, including rain or snow, a significant improvement to other vehicle guidance systems based upon optics."
The 19th century called....they want their trams back.
what about other sources of mangentic interference (say the motor of an electric vehicle, etc.)?
This is no different than the head of a hard drive traveling over the disk surface. The magnets can be in a coded pattern that is encrypted a certain way that would be robust enough to overcome possible interference, whether accidental or intentional.
Yes, there are always risks of sabotage or an accident but this is no different than the risks of our current roadways. What's to stop someone from spreading caltrops across the road and causing a massive accident? How about the accidental interference of an oil spill or a bridge support giving way?
As with everything, you try to build redundancy and robustness into the system and limit the risks. Just because a system has the possibility of failing doesn't mean the idea is worthless.
Sapere aude!
1995 Called... San Diego Anyone?
The Carpool lanes in San Diego I15 had magnets put in them over 10 years ago and fully autonomous GM cars navigated the roads effortlessly.
This was almost 15 freaking yeats ago...
Anyone so NOT impressed by this?
...a car with anti-lock brakes still rear-ends someone?
"Cars that drive themselves" won't arrive as a new option in model year 20XX. They'll encroach bit by bit, following in the footsteps of automatic spark advance, electric starters, power steering, power brakes, automatic transmission, cruise control, electronic fuel injection, anti-lock brakes, traction control, collision avoidance, self-parking...
When you finally do get a car that can "drive itself", you'll probably be too busy talking on your cell phone and using your extended navigation/information center to notice.