Google: Driverless cars are mastering city streets

2014-04-28 22:18
Google Street View car. (SAPA)

Google Street View car. (SAPA)

Multimedia   ·   User Galleries   ·   News in Pictures Send us your pictures  ·  Send us your stories

Los Angeles - Google says its self-driving cars are motoring along: they can navigate freeways comfortably, albeit with a driver ready to take control. But city driving - with its obstacle course of stray walkers, bicyclists and blind corners - has been a far greater challenge for the cars' computers.

In a blog entry posted on Monday, the project's leader said test cars now can handle thousands of urban situations that would have stumped them a year or two ago.

"We're growing more optimistic that we're heading toward an achievable goal - a vehicle that operates fully without human intervention," project director Chris Urmson wrote.

Urmson's post was the company's first official update since 2012 on progress toward a driverless car, a project within the company's secretive Google X lab.

The company has said its goal is to get the technology to the public by 2017. In initial iterations, human drivers would be expected to take control if the computer fails. The promise is that, eventually, there would be no need for a driver. Passengers could read, daydream, even sleep - or work - while the car drives.

Google maintains that computers will one day drive far more safely than humans, and part of the company's pitch is that robot cars can substantially reduce traffic fatalities.

The basics already are in place. The task for Google - and traditional carmakers, which also are testing driverless cars - is perfecting technology strapped onto its fleet of about two dozen Lexus RX450H SUVs.

Sensors including radar and lasers create 3D maps of a self-driving car's surroundings in real time, while Google's software sorts objects into four categories: moving vehicles, pedestrians, cyclists and static things such as signs, curbs and parked cars.

Initially, those plots were fairly crude. A gaggle of pedestrians on a street corner registered as a single person. Now, the technology can distinguish individuals, according to Google spokesperson Courtney Hohne, as well as solve other riddles such as construction zones and the likely movements of people riding bicycles.

To deal with cyclists, engineers initially programmed the software to look for hand gestures that indicate an upcoming turn. Then they realised that most cyclists don't use standard gestures - and still others weave down a road the wrong way.

So engineers have taught the software to predict the behaviour of cyclists based on thousands of encounters during the 16 000km or so the cars have driven autonomously on city streets, Hohne said. The software projects a cyclist's likely movements and plots the car's path accordingly - then reacts if something unexpected happens.

"A mile of city driving is much more complex than a mile of freeway driving, with hundreds of different objects moving according to different rules of the road in a small area," Urmson wrote.

Before recent breakthroughs, Google had contemplated mapping all the world's stop signs. Now the technology can read stop signs, including those held in the hands of school crossing guards, Hohne said.

Problems to be solved

While the car knows to stop, just when to start again is still a challenge, partly because the cars are programmed to drive defensively. At a four-way stop, Google's cars have been known to wait in place as people driving in other directions edge out into the intersection - or roll through.

The cars still need work on other predictably common tasks. Among them, understanding the gestures that drivers give one another to signal it's OK to merge or change lanes, turning right on red and driving in rain or fog (which requires more sophisticated sensors).

And when will these and other problems be solved?

"You can count on one hand the number of years until people, ordinary people, can experience this," company co-founder Sergey Brin said in September 2012. He made the remarks at a ceremony where California Governor Jerry Brown signed legislation legalising the cars on public roads in the state.

To date, Google's cars have gone about 1.1 million kilometres in self-driving mode, the vast majority on freeways, the company said.

California's Department of Motor Vehicles is in the process of writing regulations to implement that law. Nevada, Florida, Michigan and Washington, DC, also have written driverless car laws.

Google has not said how it plans to market the technology. Options include collaborating with major carmakers or giving away the software, as the company did with its Android operating system. While Google has the balance sheet to invest in making cars, that likelihood is remote.

Traditional automakers also are developing driverless cars. Renault-Nissan CEO Carlos Ghosn said he hopes to deliver a model to the public by 2020.

Join the conversation! encourages commentary submitted via MyNews24. Contributions of 200 words or more will be considered for publication.

We reserve editorial discretion to decide what will be published.
Read our comments policy for guidelines on contributions.
Read more on:    google  |  technology publishes all comments posted on articles provided that they adhere to our Comments Policy. Should you wish to report a comment for editorial review, please do so by clicking the 'Report Comment' button to the right of each comment.

Comment on this story
Comments have been closed for this article.

Inside News24


Rugby World Cup 2015

All the action from the 2015 RWC, including live coverage of all 48 matches, breaking news, fixtures, results, logs - and much more!


Rugby World Cup 2015

Boks can brace for Wales - bookies
'England can't afford me', jokes Gatland
Boot boys Biggar, Foley set for showdown
Wales seek to end woeful Wallaby run
Traffic Alerts

It is always easier to notice the faults in others rather than face our own. Focusing too much on the perfect and ideal more

There are new stories on the homepage. Click here to see them.


Create Profile

Creating your profile will enable you to submit photos and stories to get published on News24.

Please provide a username for your profile page:

This username must be unique, cannot be edited and will be used in the URL to your profile page across the entire network.


Location Settings

News24 allows you to edit the display of certain components based on a location. If you wish to personalise the page based on your preferences, please select a location for each component and click "Submit" in order for the changes to take affect.

Facebook Sign-In

Hi News addict,

Join the News24 Community to be involved in breaking the news.

Log in with Facebook to comment and personalise news, weather and listings.