Ronald Bailey, Science Correspondent, Reason magazine (adapted
from "Will Politicians Block Our Driverless Future," Reason.com, June
18, 2016)
There are two "equally important components that will determine the
future of autonomous vehicles," Lyft's vice president for government
relations, Joseph Okpaku said at a March Senate Commerce Committee
hearing. "The first is
the interaction of everyday people with these new
vehicles, and the second is
the much more unpredictable interface of
government with this entirely new transportation resource."
University of Texas engineer Kara Kockelman notes that traditional
automakers tend to "see the transition to self-driving as a very
natural, very normal process adding over time features like GPS,
adaptive cruise control, cameras, lane-keeping-assist systems, dedicated
short-range communication, and so forth." Such semi-autonomous vehicles
can safely operate only in predictable traffic environments, so some
manufacturers are suggesting that dedicated additional infrastructure,
such as separate highway lanes, be built for them.
But "special lanes are a bad idea," says Kockelman. "They would be
incredibly expensive and constraining." Planners, politicians, and
regulators may think that establishing dedicated infrastructure for
self-driving cars is helpful, but autonomous vehicle pioneer Brad
Templeton notes that "such rules could easily lead to them not being
allowed in ordinary lanes."
Kockelman argues that semi-autonomous vehicles, or what NHTSA calls
"limited self-driving automation," present a big safety problem. With
these so-called Level 3 vehicles, drivers cede full control to the car
for the most part, but must be ready at all times to take over if
something untoward occurs. The problem is that such semi-autonomous cars
travel along safely 99 percent of the time, allowing the attention of
their bored drivers to falter. In an August 2015 study, NHTSA reported
that depending on the on-board alert, it took drivers as long as 17
seconds to regain manual control of the semi-autonomous car. "The
radical change to full automation is important," argues Kockelman.
"
Level
3 is too dangerous. We have to jump over that to Level 4 full
automation, and most manufacturers don't want to do that. They want
protection; they want baby steps; they want special corridors. They
won't get that."
Consequently, the first law of the robocar revolution, according to Templeton, is that "
you don't change the infrastructure."
Whatever functionality is needed to drive safely should be on board
each individual vehicle. "Just tell the software people that this is the
road you have to drive on, and let them figure it out," Templeton says.
"Everything you must do is in the software, or you lose." Some
self-driving shuttles confined to specific areas—airports, pedestrian
malls, colleges campuses—will be deployed, but they are not the future
of this technology.
Another infrastructure mistake would be mandating the deployment of
"smart roadside infrastructure," such as traffic lights and sensors to
monitor conditions like icing on bridges and communicate the information
via radio to autonomous cars. In 2015, Sens. Debbie Stabenow (D, MI),
Gary Peters (D, MI), and Lamar Alexander (R-TN) embraced this idea when
they introduced the Vehicle Innovation Act, which included spending more
than $300 million on various favored tech, including vehicle-to-vehicle
(V2V) and vehicle-to-infrastructure (V2I) communications systems.
Before embracing such external information systems,
keep in mind that
the U.S. DOT estimated in 2007 that 75% of the nation's 330,000 traffic
lights are mistimed or use obsolete control systems. "If city and
county street and road agencies can't keep traffic signals up-to-date,
how long would it take them to install and upgrade smart road systems?"
Randal O'Toole asked in a 2014 Cato Institute study, "Policy
Implications of Autonomous Vehicles." It's all most states and cities
can do to fix potholes, much less deploy and maintain sophisticated
networks of roadway sensors.
Other regulators and politicians want to require automobiles to be
equipped with V2V communications tech using dedicated short-range
communications (DSRC) protocols. The idea is that cars could talk to one
another to provide warnings of traffic jams, accidents ahead, or
vehicles in front that are braking. They might even cooperate with one
another to get through intersections. A good bit of the Obama
Administration's promised $4 billion for autonomous vehicles would be
earmarked forV2V research and development.
"
DSRC is already obsolete," argues Kockelman. "Regulators simply
can't write down a communications standard that will be useful for a
long time." Templeton agrees. "People outside the industry think it's
essential, and the car companies are just going along with it to keep
them happy," he says. "It's something designed in 2000 [that] wouldn't
be fully deployed until 2030 or later." The bottom line: "
Mandating V2V
connectivity is stupid and a waste of time."
Templeton cites the internet as a model for how to roll out the
technologies that enable self-driving cars. "
The internet is a dumb
network that connects smart devices," he explains. "
You want smart cars
running on stupid roads." Dumb networks push innovation to the edge,
giving end-users control over the speed and direction of change.