Self-Driving Dilemma: How to Pass the Wheel Between Human and Robot
Self-Driving Dilemma: How to Pass the Wheel Between Human
and Robot
Cadillac will offer eye-tracking technology; Audi wants
to let drivers look away in traffic jams
By Tim Higgins and Mike Colias Oct. 1, 2017 7:00 a.m. ET
This summer, Audi held an elaborate media event in Spain
to celebrate a new sedan that would allow drivers to let go of the wheel and
pedal while in traffic jams and pay attention to something else.
The driverless technology heralded a new era for
mainstream auto makers in their pursuit to create fully autonomous vehicles.
But the rollout by Volkswagen AG’s luxury unit—with production for the U.S.
originally planned to begin this year—is now uncertain, as the car maker
continues to wait for Congress to pass legislation paving the way for
autonomous vehicles.
“It’s not a matter of needing permission, it’s more a
matter of wanting to introduce the car when we know what the ground rules are,”
said Brad Stertz, Audi’s director of government affairs, who acknowledged a
shift in timing.
Audi’s conundrum reflects the challenge for auto makers
as they plunge into an awkward phase of development years before fully
driverless cars are ready: how exactly to pass control back and forth between
driver and machine.
Congress is still deliberating how to establish rules
governing driverless cars, for now leaving it to a patchwork of state laws.
Last week, senators said they reached a bipartisan deal on a draft of a bill
that would help speed development, but the outcome is uncertain.
“This legislation proposes common sense changes in law to
keep pace with advances in self-driving technology,” Sen. John Thune, the
Republican chairman of the commerce committee, said in a statement when
announcing the deal.
Some developers, such as Waymo, the driverless-car unit
of Google parent Alphabet Inc., are planning to skip the interim step,
convinced there isn’t a reliable way to hand off the wheel. Others are devising
semiautonomous vehicles that rely on humans when driving conditions exceed the
computer’s abilities.
General Motors Co. is marketing the new Cadillac CT6
sedan, due out this fall, which lets drivers go hands-free on the highway—but
the car also features eye-tracking technology that forces the driver to look at
the road or the robot pilot will disengage. Toyota Motor Corp. has been touting
the redesigned Lexus LS sedan that automatically can swerve to avoid
pedestrians, but drivers must keep their hands on the wheel.
The disparate approaches from some of the world’s largest
auto makers highlight the intense competition to be among the first to market
with technology many believe will upend the industry. Tesla Inc.’s introduction
of a semiautonomous system called Autopilot in 2014 has helped spearhead
development.
But the slew of semiautonomous driving technology is
arriving as the National Transportation Safety Board raises concerns in the
wake of an investigation into last year’s fatal Tesla Model S crash that found
Autopilot lacked proper safeguards to prevent misuse. The NTSB warned that
semiautonomous features such as Autopilot could lull drivers into a false sense
of security.
Federal investigators estimated the Tesla driver had at
least 10 seconds to take control of the sedan before hitting a truck crossing
the highway, but he had an “overreliance on automation.”
Following the crash, Tesla changed the software to
require drivers to keep their hands on the wheel more often and urged drivers to
remain attentive. Tesla contends Autopilot is safer than a human driver without
the aide.
Research has shown it takes most drivers two to three
seconds—perhaps longer if they are occupied—to take back control of an
automated car. “We have concerns that drivers may give over too much control
and take away some of their own attention from driving,” said David Zuby, head
of research for the Insurance Institute for Highway Safety.
Those same concerns led Waymo to abandon efforts to
create a semiautonomous system and focus instead on developing fully driverless
vehicles. As driver-assist technology improves, “and it’s still incumbent on
the human to pay attention, it’s going to be harder and harder for us humans
because we’re so imperfect,” Waymo Chief Executive John Krafcik said.
GM’s Cadillac emphasizes its new auto-driving system,
Super Cruise, keeps humans engaged. Designed to activate with the a push of a
button on most highways in the U.S. and Canada, the system takes over steering,
acceleration and braking.
To ensure the driver fixates on the road, an infrared
camera mounted on the steering column tracks the eyes. A solid green light atop
the steering wheel begins blinking if the driver looks away for about four
seconds. After another five seconds, the light flashes red, and the system
beeps or vibrates the driver’s seat.
At that point, the car stays centered but begins to
coast. The radio volume is lowered, and an automated voice tells the driver to
“take control.” Continued inaction slows the car to a stop. The process is
meant to “train” the driver to stay engaged, said Pam Fletcher, GM’s top
engineer for autonomous systems.
Audi goes one step further, saying its cameras and
sensors will allow the driver to turn their attention to “things like answer
their email, write text messages…or plan for their vacation.” The Traffic Jam
Pilot works only under about 40 miles an hour on a road with a barrier between
oncoming lanes.
After traffic frees up, the car warns the driver for 10
seconds before handing over control, coming to a gradual stop if nothing
happens. Audi plans to integrate video displays in the center dashboard that
can alert the driver.
Audi now says that gradual production of the Traffic Jam
Pilot will begin next year, with timing dependent upon government approvals,
and that the company is aiming for the feature to reach the U.S. by the fall of
2018—though it is still debating whether it will begin production of the system
without knowing if it will be sold.
“We don’t want to have a system built up and locked in
and ready to go out on dealership showrooms if there’s going to be a change,”
Audi’s Mr. Stertz said.
Comments
Post a Comment