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Connectivity as important as autonomy: forum
Making connections: A specially modified Volvo XC-90 recently completed Australia's first autonomous vehicle demonstration, using a combination of environmental sensors and connections to satellite and internet networks.
Automated vehicles need P2P, internet and infrastructure connectivity to succeed
4 March 2016
DRIVERLESS cars continue to garner attention from both the public and media,
but a technical forum has heard that unless connectivity infrastructure is
developed in parallel, they will not achieve their full potential as production
Automated vehicles are predicted to offer major advances in safety and
significantly reduced road fatalities, but they will not automatically achieve
the expected productivity gains without connectivity said Cohda Wireless chief
executive Paul Gray.
Connectivity refers to short-range communication between cars and
infrastructure, including traffic lights and road signs, as well as connection
to the Internet, which can provide real-time congestion information and
re-routing depending on conditions.
Based in South Australia, Cohda is a leader in Dedicated Short-Range
Communications required to connect vehicles and the infrastructure around them
and its equipment, developed in conjunction with NXP of the US, will be
incorporated into a Delphi unit that will be installed on the 2017 Cadillac CTS.
Speaking at a technical briefing organised by Holden, Mr Gray said autonomous
vehicle supporting infrastructure needed just as much attention as the vehicles
“Autonomous vehicles get a lot more press than the connected vehicle side of
things, but that doesn’t mean they’re competing technologies,” he said. “They
are very much complementary technologies.”
He said civil authorities would achieve much more in the way of safety,
productivity, environment and mobility if the two technologies were used
together and that a study showed congestion in Sydney costs road users an
estimated $5.1 billion a year, and this was projected to rise to $8.8 billion
In addition, there are 1600 road fatalities in Australia each year, a figure
that could be sharply reduced with the adoption of automated cars, said Mr Gray.
“In fact, whilst automated vehicles can do a lot, especially in terms of
safety, it’s really the productivity side of things that is critical to achieve
the greatest benefits.”
“My favourite quote was from a gentleman from the Federal Highways in the US,
who said that there was no doubt that autonomous cars would be safer than
manual cars, but if they’re not connected to the infrastructure, then they’re
going to be stuck in traffic just as much as manual cars.”
Mr Gray went on to explain that, while automated cars have many sensors giving
them a view of the world immediately around them, communications through DSRC
and connection to the Internet offers the wider view of the environment
necessary for efficient navigation through a city or to a destination.
Peer to peer connectivity allows vehicles access to the sensors of vehicles in
their vicinity in addition to their own arrays, enabling the sharing of
information about traffic signals, road works and traffic collisions, for
He said his favourite application for this all-around connectivity was the
Green Wave concept, which relies on signal phase information from traffic
lights along a major route.
This lets the driver know what speed should be used in order to catch the next
green light without having to slow down and then accelerate again.
“The US Department of Transportation did some trials of this with manual
drivers and found that this simple application generated a 7.0 per cent fuel
saving, which is quite interesting by itself.”
However, the system relied on the drivers noticing that there was a recommended
speed, deciding to follow that recommendation and then being able to adhere to
the recommended speed.
“The department of transportation asked themselves well, what if we were to
automate this. So they developed this GlidePath project. It was very simple
information, just longitudinal speed control, which is essentially an adaptive
cruise control, a technology that is quite mature today.
“By adding the adaptive cruise control and wiring it into the connected
sequence the fuel saving increased by a factor of three, from 7.0 per cent to
22 per cent. And the cars were doing a much better job of sticking to that
Mr Gray announced that Cohda was conducting a trial with the government of NSW
into freight signal priority.
“Congestion costs us billions of dollars a year. Half of that cost comes from
freight. Perhaps we should give priority to freight vehicles because that’s
going to have a big economic impact.”